xwayland: assume views wanting decorations also want focus

xwayland: assume views wanting decorations also want focus

Assume that Globally Active xwayland views do want focus if they want
window decorations (according to _MOTIF_WM_HINTS). This is a stop-gap
fix to ensure that various applications (mainly Java-based ones such as
IntelliJ IDEA) get focus normally and appear in the window switcher. It
would be better to match based on _NET_WM_WINDOW_TYPE instead, but that
property isn't currently available through wlroots API.

Fixes (partially): 7e72bf975fb65c8290b398d21b2ad9d87a22880f
("view/xwayland: avoid focusing views that don't want focus")