Ref the popover before activating the item
Ref the popover before activating the item

Otherwise the item could cause the popover to be destroyed,
for example a Quit item, and cause a warning to be printed.

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