Display Submit,Cancel button for Evacuate Instances in a nested list

Issue: ManageIQ#6480

Remove %div_for_paging, render angular 'custom_form_buttons_controller_as' partial for buttons
which works for both explorer and non-explorer screens, hide form_buttons_div and paging_div.
Redirect to proper screen after evacuating Instances in a nested list.

app/assets/javascripts/components/vm_cloud/vm_cloud_evacuate_form.js

@@ -21,6 +21,8 @@ function vmCloudEvacuateFormController($http, $scope, miqService) {
     vm.hosts = [];
     vm.formId = vm.recordId;
     vm.modelCopy = angular.copy(vm.vmCloudModel);
+    vm.newRecord = true;
+    vm.saveable = miqService.saveable;
 
     ManageIQ.angular.scope = $scope;
     $scope.saveable = miqService.saveable;

app/controllers/mixins/actions/vm_actions/evacuate.rb

@@ -40,6 +40,7 @@ def evacuate_vm
 
           @sb[:action] = nil
           if @sb[:explorer]
+            @sb[:explorer] = nil
             replace_right_cell
           else
             flash_to_session

app/controllers/vm_common.rb

@@ -1230,7 +1230,7 @@ def replace_right_cell(options = {})
             presenter.update(:form_buttons_div, '')
             presenter.remove_paging.hide(:form_buttons_div)
           end
-        elsif %w[attach detach live_migrate resize evacuate ownership add_security_group remove_security_group
+        elsif %w[attach detach live_migrate resize ownership add_security_group remove_security_group
                  associate_floating_ip disassociate_floating_ip].include?(@sb[:action])
           presenter.update(:form_buttons_div, r[:partial => "layouts/angular/paging_div_buttons"])
         elsif %w[reconfigure_update retire].exclude?(action) && !hide_x_edit_buttons(action)
@@ -1247,7 +1247,12 @@ def replace_right_cell(options = {})
         # evm_relationship_update uses React form and buttons
         presenter.hide(:form_buttons_div) if action == "evm_relationship_update"
       end
-      presenter.show(:paging_div)
+
+      if %w[evacuate].include?(@sb[:action])
+        presenter.hide(:form_buttons_div, :paging_div)
+      else
+        presenter.show(:paging_div)
+      end
     else
       presenter.hide(:paging_div)
     end

app/views/static/evacuate-form.html.haml

@@ -46,7 +46,5 @@
           %select{:name        => 'destination_host',
                   'ng-model'   => 'vm.vmCloudModel.host',
                   'ng-options' => 'host.name as host.name for host in vm.hosts track by host.id'}
-%div_for_paging{'ng-controller'                    => "pagingDivButtonGroupController",
-                'paging_div_buttons_state_enabled' => true,
-                'paging_div_buttons_id'            => "angular_paging_div_buttons",
-                'paging_div_buttons_type'          => "Submit"}
+.clearfix
+  = render :partial => 'layouts/angular/custom_form_buttons_controller_as', :locals => {:button_label => 'Submit', :button_click => 'vm.submitClicked()'}

spec/controllers/mixins/actions/vm_actions/evacuate_spec.rb

@@ -0,0 +1,17 @@
+describe Mixins::Actions::VmActions::Evacuate do
+  describe '#evacuate_vm' do
+    let(:controller) { VmCloudController.new }
+
+    before do
+      allow(controller).to receive(:assert_privileges)
+      allow(controller).to receive(:replace_right_cell)
+      controller.instance_variable_set(:@sb, :explorer => true)
+      controller.params = {}
+    end
+
+    it 'sets @sb[:explorer] back to nil after canceling/submitting evacuating selected Instances' do
+      controller.send(:evacuate_vm)
+      expect(controller.instance_variable_get(:@sb)[:explorer]).to be_nil
+    end
+  end
+end