GtkLabel: Make context menus on links work
GtkLabel: Make context menus on links work

We see an active link when creating the menu, but by the time
the menuitem is activated, we've received a leave notify that
makes the label clear its active link. Instead, give the
menuitems a direct reference to the link that is active when
the menu is created.

Problem pointed out by Tim Baedert

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