FEATURE: minor UI tweaks in template settings + add events into OnePage base template

app/Handlers/Contracts/BaseModuleHandler.php

@@ -5,8 +5,6 @@ use App\Models\User;
 
 interface BaseModuleHandler
 {
-//    public static function getModuleId();
-
     /**
      * Register admin menu (or multiple ones)
      *
@@ -18,9 +16,10 @@ interface BaseModuleHandler
     public static function registerAdminMenu(User $user);
 
     /**
-     * Install module
+     * Install module.
      *
-     * @return mixed
+     * This method is called after inserting info about module into database. It can be called only using Artisan in
+     * CLI.
      */
     public static function install();
 }

app/Http/Controllers/Admin/Contents/EditContent.php

@@ -300,7 +300,7 @@ class EditContent extends Controller
         } catch (NotFoundHttpException $e) {
             // page not found
             return redirect()
-                ->route('content.overview')
+                ->back()
                 ->with('error', trans('admin/contents.invalidPage'));
         }
 
@@ -315,7 +315,7 @@ class EditContent extends Controller
         // was something changed?
         if ($changedColumns == 0) {
             return redirect()
-                ->route('content.overview')
+                ->back()
                 ->with('error', trans('admin/contents.nothingToEdit'));
         }
 
@@ -324,7 +324,7 @@ class EditContent extends Controller
 
         // redirect back to overview with info for user
         return redirect()
-            ->route('content.overview')
+            ->back()
             ->with('success', trans('admin/contents.homepageSetup', [
                 'name' => $page->title,
                 'url'  => $page->url