03e3d9f435
Internally in gnome-shell it may be useful to modify the actions available on a notification while it’s still visible, but without clearing them all and re-creating them. Allow that by returning the action object when adding it, and adding a `removeAction()` method which takes that object and removes it. Signed-off-by: Philip Withnall <pwithnall@gnome.org> Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3251>