bloatpad: fix the action associated with the notification
bloatpad: fix the action associated with the notification

Notifications can only be associated with application actions,
but clear is a window action. Introduce a "clear-all" action
that forwards to clear on all windows.

https://bugzilla.gnome.org/show_bug.cgi?id=721633

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