This fixes various problems I've run into while trying to use Fusion 360 in wine. - stacking issues in unmanaged mode - I also attempted to apply the same fix for managed mode, but it looks difficult to do this in a way that plays well with window managers; I think it's best left up to them to keep override_redirect windows at the top of the stack) - when the window manager sets our state to withdrawn, tell the window that it's been minimized, since the semantics are very similar - the last one is a hack because I don't really know what to do about it, when clicking on the floating popups, they gain focus, which causes wine to incorrectly make them managed and that breaks everything
-- v2: winex11: don't make a window managed because it's active winex11: pass ICCCM withdrawn state as minimized winex11: restack a window's owned popups above it