7951ddab40
As per commit f71151a5 we were ignoring WM_TAKE_FOCUS-only windows as focus targets, however this might end-up in an infinite loop if there are multiple non-input windows stacked. So, accept any focusable window as fallback focus target even if it's a take-focus one (that might not reply to the request). Added a stacking test to verify this. Closes: https://gitlab.gnome.org/GNOME/mutter/issues/660 https://gitlab.gnome.org/GNOME/mutter/merge_requests/669 (cherry picked from commit c327b2df95ff9979dd22bca2e0d285e1b3ba0add)