Quick open actions become always visible after opening explorer context menu

[joaomoreno]

1. Open quick open, all is good
2. Right click in Explorer to open the context menu
3. Open quick open, all actions are visible

Bug is somewhere in this CSS which overwrites the display: none quick open depends on:

vscode/src/vs/base/browser/ui/menu/menu.ts

Lines 952 to 960 in 0670596

	.monaco-action-bar .action-item .icon,
	.monaco-action-bar .action-item .codicon {
	display: inline-block;
	}
	.monaco-action-bar .action-item .codicon {
	display: flex;
	align-items: center;
	}

I thought all that CSS was only meant for the shadow DOM, shouldn't all of that be properly scoped?

[sbatten]

for menus that do not use shadow dom like global menu, we push this css to a shared top-level element in the dom. I'm not sure why this is happening now since this css exists in actionbar.css as well, but I will scope mine to monaco-menu as a fix