src/vs/workbench/browser/parts/titlebar/menubarControl.ts/CustomMenubarControl/doUpdateMenubar
class CustomMenubarControl:	protected doUpdateMenubar(firstTime: boolean): void {
		if (!this.focusInsideMenubar) {
			this.setupCustomMenubar(firstTime);
		}

		if (firstTime) {
			this.pendingFirstTimeUpdate = true;
		}
	}