
Extensions can export asynchronous enable() and disable() functions. To guard against re-entrancy when enabling or disabling an extension, this commit adds two new states: ENABLING and DISABLING which are set immediately prior to calling enable() and disable() respectively. This commit updates the extensions CLI and Extensions app with new strings for these states. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2364>