diff --git a/CHANGELOG b/CHANGELOG
index f17e9bd..12c5e3e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,11 @@
 Roundcube Webmail SAUserPrefs
 =============================
 
+Version 1.18.3 (2020-11-20, rc-1.4)
+=================================================
+ * Improve address rule input
+ * Fix address rule delete button
+
 Version 1.18.2 (2020-04-27, rc-1.4)
 =================================================
  * Revert depreciation of sortedASC & sortedDESC
diff --git a/composer.json b/composer.json
index 08bca4e..a4c3aa3 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
   "homepage": "https://github.com/johndoh/roundcube-sauserprefs/",
   "license": "GPL-3.0",
   "type": "roundcube-plugin",
-  "version": "1.18.1",
+  "version": "1.18.3",
   "authors": [
     {
       "name": "Philip Weir",
@@ -13,14 +13,8 @@
       "role": "Developer"
     }
   ],
-  "repositories": [
-    {
-      "type": "composer",
-      "url": "https://plugins.roundcube.net"
-    }
-  ],
   "require": {
-    "php": ">=5.2.1",
+    "php": ">=5.4.0",
     "roundcube/plugin-installer": ">=0.1.2"
   },
   "extra": {
diff --git a/lib/Roundcube/rcube_sauserprefs_storage_sql.php b/lib/Roundcube/rcube_sauserprefs_storage_sql.php
index 0316070..062bce4 100644
--- a/lib/Roundcube/rcube_sauserprefs_storage_sql.php
+++ b/lib/Roundcube/rcube_sauserprefs_storage_sql.php
@@ -63,7 +63,7 @@ public function __construct($config)
     public function load_prefs($user)
     {
         $this->_db_connect('r');
-        $prefs = array();
+        $prefs = [];
 
         $sql_result = $this->db->query(
             "SELECT `{$this->preference_field}`, `{$this->value_field}` FROM `{$this->table_name}` WHERE `{$this->username_field}` = ?;",
@@ -75,7 +75,7 @@ public function load_prefs($user)
             $pref_value = $sql_arr[$this->value_field];
 
             if ($pref_name == 'whitelist_from' || $pref_name == 'blacklist_from' || $pref_name == 'whitelist_to') {
-                $prefs['addresses'][] = array('field' => $pref_name, 'value' => $pref_value);
+                $prefs['addresses'][] = ['field' => $pref_name, 'value' => $pref_value];
             }
             else {
                 $prefs[$pref_name] = $pref_value;
@@ -111,7 +111,7 @@ public function save_prefs($user_id, $new_prefs, $cur_prefs, $global_prefs)
         $result = true;
 
         // process prefs
-        $actions = array();
+        $actions = [];
         foreach ($new_prefs as $preference => $value) {
             if ($preference == 'addresses') {
                 foreach ($value as $address) {
@@ -122,14 +122,14 @@ public function save_prefs($user_id, $new_prefs, $cur_prefs, $global_prefs)
             }
             elseif (array_key_exists($preference, $cur_prefs)) {
                 if ($value == "" || $value == $global_prefs[$preference]) {
-                    $actions['DELETE'][] = array('field' => $preference, 'value' => null);
+                    $actions['DELETE'][] = ['field' => $preference, 'value' => null];
                 }
                 elseif ($value != $cur_prefs[$preference]) {
-                    $actions['UPDATE'][] = array('field' => $preference, 'value' => $value);
+                    $actions['UPDATE'][] = ['field' => $preference, 'value' => $value];
                 }
             }
             elseif ($value != $global_prefs[$preference]) {
-                $actions['INSERT'][] = array('field' => $preference, 'value' => $value);
+                $actions['INSERT'][] = ['field' => $preference, 'value' => $value];
             }
         }
 
@@ -168,7 +168,7 @@ public function save_prefs($user_id, $new_prefs, $cur_prefs, $global_prefs)
                     }
                     elseif ($type == 'DELETE') {
                         $sql = "DELETE FROM `{$this->table_name}` WHERE `{$this->username_field}` = ? AND `{$this->preference_field}` = ?";
-                        $vals = array($user_id, $pref['field']);
+                        $vals = [$user_id, $pref['field']];
                         $msg = '"' . $pref['field'] . '"';
 
                         if ($pref['value']) {
@@ -201,7 +201,7 @@ public function purge_bayes($user_id)
     {
         $result = false;
         $this->_db_connect('w');
-        $queries = !is_array($this->bayes_delete_query) ? array($this->bayes_delete_query) : $this->bayes_delete_query;
+        $queries = !is_array($this->bayes_delete_query) ? [$this->bayes_delete_query] : $this->bayes_delete_query;
 
         foreach ($queries as $sql) {
             $sql = str_replace('%u', $this->db->quote($user_id, 'text'), $sql);
@@ -235,11 +235,7 @@ private function _db_connect($mode)
 
         // check DB connections and exit on failure
         if ($err_str = $this->db->is_error()) {
-            rcube::raise_error(array(
-                'code' => 603,
-                'type' => 'db',
-                'message' => $err_str
-            ), false, true);
+            rcube::raise_error(['code' => 603, 'type' => 'db', 'message' => $err_str], false, true);
         }
     }
 }
diff --git a/sauserprefs.js b/sauserprefs.js
index 1411cb1..b1b8b15 100644
--- a/sauserprefs.js
+++ b/sauserprefs.js
@@ -87,7 +87,11 @@ rcube_webmail.prototype.sauserprefs_addressrule_insert_row = function(p) {
 }
 
 rcube_webmail.prototype.sauserprefs_addressrule_delete_row = function(obj) {
-    var actField = $(obj).closest('td').find('input[name="_address_rule_act[]"]');
+    var actField = $(obj).find('input[name="_address_rule_act[]"]');
+
+    // skip empty rows
+    if (!actField.parent().is(':visible'))
+        return;
 
     if (actField.val() == "INSERT") {
         $(obj).closest('tr').remove();
@@ -233,7 +237,7 @@ $(document).ready(function() {
 
                 rcmail.register_command('plugin.sauserprefs.addressrule_del', function(props, obj) {
                     rcmail.confirm_dialog(rcmail.get_label('spamaddressdelete','sauserprefs'), 'delete', function(e, ref) {
-                            ref.sauserprefs_addressrule_delete_row(obj);
+                            ref.sauserprefs_addressrule_delete_row($(obj).parent());
                         });
                     return false;
                 }, true);
@@ -270,7 +274,7 @@ $(document).ready(function() {
 
                 rcmail.register_command('plugin.sauserprefs.whitelist_delete_all', function() {
                     rcmail.confirm_dialog(rcmail.get_label('spamaddressdeleteall','sauserprefs'), 'delete', function(e, ref) {
-                            $.each($('#address-rules-table tbody tr').filter(':visible'), function() { ref.sauserprefs_addressrule_delete_row(this); });
+                            $.each($('#address-rules-table tbody tr'), function() { ref.sauserprefs_addressrule_delete_row(this); });
                         });
                     return false;
                 }, true);
@@ -334,7 +338,7 @@ $(document).ready(function() {
                         $('#rcmfd_spamlevelchar').val(ref.env.add_header_all_Level.substr(7, 1)); // Spam level char
 
                         // Delete whitelist
-                        $.each($('#address-rules-table tbody tr').filter(':visible'), function() { ref.sauserprefs_addressrule_delete_row(this) });
+                        $.each($('#address-rules-table tbody tr'), function() { ref.sauserprefs_addressrule_delete_row(this) });
 
                         // Toggle dependant fields
                         ref.sauserprefs_toggle_level_char($('#rcmfd_spamlevelstars'));
diff --git a/sauserprefs.php b/sauserprefs.php
index c865a7d..a87f40b 100644
--- a/sauserprefs.php
+++ b/sauserprefs.php
@@ -225,10 +225,10 @@ public function gen_form($attrib)
 
         // output table sorting prefs
         $sorts = $this->rcube->config->get('sauserprefs_sort', array());
-        if (!array_key_exists('#spam-langs-table', $sorts)) {
+        if (!isset($sorts['#spam-langs-table'])) {
             $sorts['#spam-langs-table'] = array(0, 'true');
         }
-        if (!array_key_exists('#address-rules-table', $sorts)) {
+        if (!isset($sorts['#address-rules-table'])) {
             $sorts['#address-rules-table'] = array(1, 'true');
         }
         $this->rcube->output->set_env('sauserprefs_sort', $sorts);
@@ -605,7 +605,7 @@ private function _load_prefs($user)
         $prefs = $this->storage->load_prefs($user);
 
         // sort address rules
-        if (is_array($prefs['addresses'])) {
+        if (isset($prefs['addresses']) && is_array($prefs['addresses'])) {
             usort($prefs['addresses'], array($this, 'sort_addresses'));
         }
 
@@ -707,7 +707,7 @@ private function _prefs_block($part, $attrib)
                         $button = '';
                         $checkbox_display = array();
 
-                        if ($attrib['lang_list_buttons'] == '1') {
+                        if (isset($attrib['lang_list_buttons']) && $attrib['lang_list_buttons'] == '1') {
                             $button_type = in_array($lang_code, $locales_langs) ? 'enabled' : 'disabled';
                             $button = $this->rcube->output->button(array('command' => 'plugin.sauserprefs.message_lang', 'prop' => $lang_code, 'type' => 'link', 'class' => 'lang-' . $button_type, 'id' => 'spam_lang_' . $i, 'title' => 'sauserprefs.' . $button_type, 'content' => ' '));
                             $checkbox_display = array('style' => 'display: none;');
@@ -1175,7 +1175,7 @@ private function _prefs_block($part, $attrib)
                         $table->add('title', $row['title']);
                     }
 
-                    $table->add($row['content_attribs'], $row['content']);
+                    $table->add(isset($row['content_attribs']) ? $row['content_attribs'] : null, $row['content']);
 
                     if (isset($row['help'])) {
                         $table->add('help', $row['help']);
@@ -1186,7 +1186,7 @@ private function _prefs_block($part, $attrib)
             }
 
             if (!empty($content)) {
-                $out .= html::tag('fieldset', $class, html::tag('legend', null, $block['name']) . $block['intro'] . $content);
+                $out .= html::tag('fieldset', $class, html::tag('legend', null, $block['name']) . (isset($block['intro']) ? $block['intro'] : '') . $content);
             }
         }
 
@@ -1209,6 +1209,10 @@ private function _address_row(&$address_table, $field, $value, $attrib, $row_att
             case "whitelist_to":
                 $fieldtxt = rcube_utils::rep_specialchars_output($this->gettext('whitelist_to'));
                 break;
+            default:
+                // for default/placeholder row
+                $fieldtxt = '';
+                $class = '';
         }
 
         $row_attrib = !isset($field) ? array_merge($row_attrib, array('style' => 'display: none;')) : array_merge($row_attrib, array('class' => $field));
@@ -1236,7 +1240,7 @@ private function _score_select($field_name, $field_id, $val, $args = array())
         for ($i = $config['min']; $i <= $config['max']; $i += $config['increment']) {
             $vals[number_format($i, 5, '.', '')] = array('val' => number_format($i, $decPlaces, '.', ''), 'text' => number_format($i, $decPlaces, $locale_info['decimal_point'], ''));
         }
-        if (array_key_exists('extra', $config)) {
+        if (isset($config['extra'])) {
             foreach ($config['extra'] as $extra) {
                 $decPlaces = self::decimal_places($extra['increment'], $locale_info['decimal_point']);
                 for ($i = $extra['min']; $i <= $extra['max']; $i += $extra['increment']) {
diff --git a/skins/elastic/templates/settingsedit.html b/skins/elastic/templates/settingsedit.html
index 75dc8f4..0bcbfd2 100644
--- a/skins/elastic/templates/settingsedit.html
+++ b/skins/elastic/templates/settingsedit.html
@@ -19,6 +19,9 @@ <h1 class="voice"><roundcube:object name="sectionname" /></h1>
 // add bootstrap styles for radio buttons
 $('[type=radio]', $('.propform', document)).addClass('form-check-input').parents('tr').addClass('form-check');
 
+// add bootstrap styles for selects (done here to prevent flicker in dark mode)
+$('select', $('.propform', document)).addClass('custom-select');
+
 // special display for small spam char input box
 $('#rcmfd_spamlevelchar').parents('tr').addClass('saup-spam-char-row');
 
@@ -35,7 +38,6 @@ <h1 class="voice"><roundcube:object name="sectionname" /></h1>
     $('#test-scores-table > thead > tr > th').first().addClass('col-sm-4');
     $('#test-scores-table > thead > tr > th').last().addClass('col-sm-8');
 }
-
 </script>
 
 <roundcube:include file="includes/footer.html" />
\ No newline at end of file