Revert "feat(toolbar && menu): Hide before element in Submenu in Generic"

This reverts commit 29ea45d.

Author: Ruslan Farkhutdinov

packages/devextreme-scss/scss/widgets/generic/htmlEditor/_index.scss

@@ -211,12 +211,6 @@
   border-top-color: $htmleditor-toolbar-border-color;
 }
 
-.dx-htmleditor-toolbar-ai-overlay-content {
-  .dx-context-menu-content-delimiter::before {
-    content: none;
-  }
-}
-
 .dx-resize-frame {
   border-color: $htmleditor-resize-frame-border-color;
 

packages/devextreme/js/__internal/ui/html_editor/modules/m_toolbar.ts

@@ -15,7 +15,7 @@ import {
   isDefined, isEmptyObject, isObject, isString,
 } from '@js/core/utils/type';
 import type { AICommandName, AICustomCommand, AIToolbarItem } from '@js/ui/html_editor';
-import type { ContentReadyEvent, ItemClickEvent, SubmenuShownEvent } from '@js/ui/menu';
+import type { ContentReadyEvent, ItemClickEvent } from '@js/ui/menu';
 import type { Item } from '@js/ui/toolbar';
 import Toolbar from '@js/ui/toolbar';
 import errors from '@js/ui/widget/ui.errors';
@@ -487,9 +487,6 @@ if (Quill) {
       const options = {
         dataSource,
         disabled: isMenuDisabled,
-        onSubmenuShown: ({ submenuContainer }: SubmenuShownEvent): void => {
-          $(submenuContainer).parent().addClass(TOOLBAR_AI_OVERLAY_CONTENT_CLASS);
-        },
         onContentReady: (e: ContentReadyEvent): void => {
           const $item = $(e.element).find(`.${DX_MENU_ITEM_CLASS}`).first();
           $item.attr('aria-label', localizationMessage.format('dxHtmlEditor-aiToolbarItemAriaLabel'));