052ef4e7bc
If we're going to move or resize an xwayland surface, we used to just pick the first seat in the list for doing the move/resize. Ideally we can map from the XInput device doing the click to the corresponding weston_seat, but that requires using xcb xinput, which isn't well supported. Instead, lets use a simple heuristic that just picks the pointer that most recently delivered a button event to the window in question. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=73807