popover: Remember last focused widget on the toplevel when a popover is shown
popover: Remember last focused widget on the toplevel when a popover is shown

This is so the previously focused widget can regain focus when a modal popover
is dismissed.

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