private void uninstallEventQueue() {
		if( subMenuEventQueue != null ) {
			subMenuEventQueue.uninstall();
			subMenuEventQueue = null;
		}

		if( safeTrianglePainter != null ) {
			safeTrianglePainter.uninstall();
			safeTrianglePainter = null;
		}
	}
Improves usability of submenus by using a
<a href="https://height.app/blog/guide-to-build-context-menus#safe-triangle">safe triangle</a>
to avoid that the submenu closes while the user moves the mouse to it.

@author Karl Tauber
flatlaf-core/src/main/java/com/formdev/flatlaf/SubMenuUsabilityHelper.java