spicec-x11: Request targets from new clipboard owner
spicec-x11: Request targets from new clipboard owner

Request targets from new clipboard owner, rather then assuming UTF-8
(not entirely complete yet, the last pieces will be in another patch).

Atleast as important this code unifies the selection getting code
for incr and non incr getting of selection data so that it can be
used for both getting regular selection data and for getting targets
selection data.

This also fixes a big bug in the (I believe untested sofar) incr support
code which was interpreting the contents of PropertyNotify events as
XSelectionEvents rather then as XpropertyEvents which are completely
differen structs!

fgouget/spice,alon/spice-server,mathslinux/spice,alon/spice-server,mathslinux/spice,virtualAMP/spiceplay,ya-mouse/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,SPICE/spice,dezelin/spice,dezelin/spice,mathslinux/spice,Fantu/spice,Fantu/spice,SPICE/spice,SPICE/spice,mathslinux/spice,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,fgouget/spice,elmarco/spice,fgouget/spice,elmarco/spice,elmarco/spice,ya-mouse/spice,alon/spice-server,elmarco/spice,virtualAMP/spiceplay,fgouget/spice,dezelin/spice,ya-mouse/spice,dezelin/spice,freedesktop-unofficial-mirror/spice__spice,dezelin/spice,elmarco/spice,virtualAMP/spiceplay,Fantu/spice,virtualAMP/spiceplay,Fantu/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server