Only show title button separator when there is something to separate
Only show title button separator when there is something to separate

https://bugzilla.gnome.org/show_bug.cgi?id=729636

jessevdk/gtk,grubersjoe/adwaita,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,grubersjoe/adwaita,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,jigpu/gtk,grubersjoe/adwaita,jigpu/gtk,chergert/gtk,ahodesuka/gtk,grubersjoe/adwaita,davidgumberg/gtk,chergert/gtk,alexlarsson/gtk,Adamovskiy/gtk,davidgumberg/gtk,alexlarsson/gtk,jessevdk/gtk,jadahl/gtk,jadahl/gtk,jadahl/gtk,jessevdk/gtk,davidgumberg/gtk,Lyude/gtk-,ahodesuka/gtk,jigpu/gtk,jessevdk/gtk,jadahl/gtk,jigpu/gtk,jigpu/gtk,Lyude/gtk-,davidgumberg/gtk,ahodesuka/gtk,alexlarsson/gtk,Adamovskiy/gtk,ahodesuka/gtk,Adamovskiy/gtk,chergert/gtk,Lyude/gtk-,ahodesuka/gtk,jigpu/gtk,jadahl/gtk,chergert/gtk,alexlarsson/gtk,davidgumberg/gtk,jadahl/gtk,jessevdk/gtk,Lyude/gtk-,ahodesuka/gtk,jessevdk/gtk,Adamovskiy/gtk,Adamovskiy/gtk,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,grubersjoe/adwaita,jadahl/gtk,davidgumberg/gtk,ahodesuka/gtk,alexlarsson/gtk,Adamovskiy/gtk,grubersjoe/adwaita,jadahl/gtk,jessevdk/gtk,Lyude/gtk-,Lyude/gtk-,Lyude/gtk-,alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,Lyude/gtk-,chergert/gtk,chergert/gtk,Adamovskiy/gtk,chergert/gtk