Alt+F4 quit dialog causes menu focus problems
In #next-update, Vitroze reported that after Alt+F4 → Cancel, opening the Problems menu and clicking outside loses focus on the main menu (x86-64 build 10211). Dezlo saw server-created menus not removing properly after cancelling the prompt. Earlier, Drago🐉 noted that closing GMod via Alt+F4 or the taskbar now brings up a confirmation menu.