Log when a site customization is deleted

app/assets/javascripts/admin/controllers/change_site_customization_details_controller.js

@@ -1,5 +1,6 @@
 /**
-  The modal for viewing the details of a staff action log record.
+  The modal for viewing the details of a staff action log record
+  for when a site customization is created or changed.
 
   @class ChangeSiteCustomizationDetailsController
   @extends Discourse.Controller

app/assets/javascripts/admin/controllers/delete_site_customization_details_controller.js

@@ -0,0 +1,15 @@
+/**
+  The modal for viewing the details of a staff action log record
+  for when a site customization is deleted.
+
+  @class DeleteSiteCustomizationDetailsController
+  @extends Discourse.Controller
+  @namespace Discourse
+  @uses Discourse.ModalFunctionality
+  @module Discourse
+**/
+Discourse.DeleteSiteCustomizationDetailsController = Discourse.ChangeSiteCustomizationDetailsController.extend({
+  onShow: function() {
+    this.selectPrevious();
+  }
+});

app/assets/javascripts/admin/models/staff_action_log.js

@@ -33,7 +33,7 @@ Discourse.StaffActionLog = Discourse.Model.extend({
   },
 
   useModalForDetails: function() {
-    return (this.get('action_name') === 'change_site_customization');
+    return _.contains(['change_site_customization', 'delete_site_customization'], this.get('action_name'));
   }.property('action_name')
 });
 

app/assets/javascripts/admin/templates/logs/site_customization_change_modal.js.handlebars

@@ -9,9 +9,13 @@
   </ul>
   <div class="modal-body">
     <div {{bindAttr class=":modal-tab :new-tab newSelected::invisible"}}>
-      {{#with new_value}}
-        {{partial "admin/templates/logs/site_customization_change_details"}}
-      {{/with}}
+      {{#if new_value}}
+        {{#with new_value}}
+          {{partial "admin/templates/logs/site_customization_change_details"}}
+        {{/with}}
+      {{else}}
+        {{i18n admin.logs.staff_actions.deleted}}
+      {{/if}}
     </div>
     <div {{bindAttr class=":modal-tab :previous-tab previousSelected::invisible"}}>
       {{#if previous_value}}

app/assets/javascripts/admin/views/modals/change_site_customization_details_view.js

@@ -1,5 +1,6 @@
 /**
-  A modal view for details of a staff action log record in a modal.
+  A modal view for details of a staff action log record in a modal
+  for when a site customization is created or changed.
 
   @class ChangeSiteCustomizationDetailsView
   @extends Discourse.ModalBodyView

app/assets/javascripts/admin/views/modals/delete_site_customization_details_view.js

@@ -0,0 +1,13 @@
+/**
+  A modal view for details of a staff action log record in a modal
+  for when a site customization is deleted.
+
+  @class DeleteSiteCustomizationDetailsView
+  @extends Discourse.ModalBodyView
+  @namespace Discourse
+  @module Discourse
+**/
+Discourse.DeleteSiteCustomizationDetailsView = Discourse.ModalBodyView.extend({
+  templateName: 'admin/templates/logs/site_customization_change_modal',
+  title: I18n.t('admin.logs.staff_actions.modal_title')
+});