We must clean up the user data of the wlr_surface for layer surfaces and
lock surfaces as fromSurface() may be called (e.g. by the idle inhibit
implementation) after the scene node has been destroyed but before the
wlr_surface is destroyed.
(cherry picked from commit 28a14c6794ddc21a23d2e14d41761007d15569e8)
This replaces the old View.fromWlrSurface function and is more general.
This commit also moves the xdg activation request_activate listener to
Server as it has no reason to be in View.
