Ability to Close Applications / Windows from the Alt-Tab switcher
(Moved from BGO#620106, since the proposed solution involves multiple patches, that are easier to review here)
Description:
When pressing Alt-Tab, user should have the ability to close apps without switching to the app, as well as to close individual windows for a given app while cycling over them using the window switcher.
The current proposal, as discussed in https://bugzilla.gnome.org/show_bug.cgi?id=620106, involves pressing Q
while the switcher is focused in either an app or an app's window, which should request closing the selected element.
See the original bug for more details.