gtk: send FALSE mark when destroying the primary surface after 1s...
gtk: send FALSE mark when destroying the primary surface after 1s...

This is similar to what is done in spicec.

mathslinux/spice-gtk,dezelin/spice-gtk,SPICE/spice-gtk,dezelin/spice-gtk,SPICE/spice-gtk,guodong/spice-gtk,SPICE/spice-gtk,guodong/spice-gtk,elmarco/spice-gtk,fgouget/spice-gtk,guodong/spice-gtk,mathslinux/spice-gtk,fgouget/spice-gtk,guodong/spice-gtk,flexVDI/spice-gtk,dezelin/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,Fantu/spice-gtk,Fantu/spice-gtk,elmarco/spice-gtk,Fantu/spice-gtk,SPICE/spice-gtk,mathslinux/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,fgouget/spice-gtk,dezelin/spice-gtk,Fantu/spice-gtk,flexVDI/spice-gtk,mathslinux/spice-gtk,elmarco/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk