entry: Improve touch popover interaction
entry: Improve touch popover interaction

Presses alternatively show and dismiss the popover, the popover is still
always shown invariably after any dragging happens (either text selection,
or dragging a text handle)

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