69bb44563d
OSD Volume popup appears when a user connects or disconnects earphones/headphones/headsets. Shows and warns the user that the volume may be set to high or low when headphones are connected or disconnected. This is a nice bit of feedback to the user that something has changed, and something that other platforms do. Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7931 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3531>