fixes #53808

src/vs/workbench/browser/parts/menubar/media/menubarpart.css

@@ -35,12 +35,15 @@
 	position: absolute;
 	left: 0px;
 	opacity: 1;
+	z-index: 2000;
 }
 
 .menubar-menu-items-holder.monaco-menu-container {
-	box-shadow: 0 2px 4px;
+	font-family: "Segoe WPC", "Segoe UI", ".SFNSDisplay-Light", "SFUIText-Light", "HelveticaNeue-Light", sans-serif, "Droid Sans Fallback";
+	outline: 0;
+	border: none;
 }
 
-.vs-dark .menubar-menu-items-holder.monaco-menu-container {
-	box-shadow: 0 2px 4px;
+.menubar-menu-items-holder.monaco-menu-container :focus {
+	outline: 0;
 }
\ No newline at end of file

src/vs/workbench/browser/parts/menubar/menubarPart.ts

@@ -867,8 +867,6 @@ export class MenubarPart extends Part {
 		let menuHolder = $(customMenu.buttonElement).div({ class: 'menubar-menu-items-holder' });
 
 		$(menuHolder.getHTMLElement().parentElement).addClass('open');
-
-		menuHolder.addClass('menubar-menu-items-holder-open context-view');
 		menuHolder.style({
 			'zoom': `${1 / browser.getZoomFactor()}`,
 			'top': `${this.container.getClientArea().height * browser.getZoomFactor()}px`