Add 'save' case for button to rename_vm method to save a new name of VM

app/controllers/vm_common.rb

@@ -831,6 +831,24 @@ def rename_vm
         flash_to_session(msg)
         javascript_redirect(previous_breadcrumb_url)
       end
+    when 'save'
+      begin
+        @record.rename(@edit[:new][:name])
+      rescue StandardError => bang
+        add_flash(_("Error during 'VM update': %{message}") % {:message => bang.message}, :error)
+      else
+        flash = _("VM \"%{name}\" was saved") % {:name => @record.name}
+      end
+      params[:id] = @record.id.to_s # reset id in params for show
+      @record = nil
+      add_flash(flash)
+      if @edit[:explorer]
+        @sb[:action] = nil
+        replace_right_cell
+      else
+        flash_to_session
+        javascript_redirect(previous_breadcrumb_url)
+      end
     when 'reset'
       vm_rename
       flash_to_session(_('All changes have been reset'), :warning)