entry: Hide popover when touching elsewhere
entry: Hide popover when touching elsewhere

Otherwise, the popover becomes 'sticky' and hard-to-dismiss.

Adamovskiy/gtk,grubersjoe/adwaita,jadahl/gtk,jigpu/gtk,chergert/gtk,chergert/gtk,chergert/gtk,davidgumberg/gtk,jigpu/gtk,alexlarsson/gtk,chergert/gtk,grubersjoe/adwaita,jadahl/gtk,Adamovskiy/gtk,jadahl/gtk,grubersjoe/adwaita,alexlarsson/gtk,Adamovskiy/gtk,davidgumberg/gtk,davidgumberg/gtk,alexlarsson/gtk,chergert/gtk,chergert/gtk,jigpu/gtk,alexlarsson/gtk,jigpu/gtk,alexlarsson/gtk,Adamovskiy/gtk,jadahl/gtk,jigpu/gtk,jadahl/gtk,jigpu/gtk,jigpu/gtk,grubersjoe/adwaita,alexlarsson/gtk,Adamovskiy/gtk,grubersjoe/adwaita,grubersjoe/adwaita,davidgumberg/gtk,grubersjoe/adwaita,Adamovskiy/gtk,grubersjoe/adwaita,davidgumberg/gtk,jadahl/gtk,chergert/gtk,alexlarsson/gtk,davidgumberg/gtk,davidgumberg/gtk,davidgumberg/gtk,chergert/gtk,jigpu/gtk,Adamovskiy/gtk,alexlarsson/gtk,jadahl/gtk,jadahl/gtk,Adamovskiy/gtk