Add command line option to malcontent-control to pre-select a user

Allow pre-selecting a user by UID or username (whichever seems most appropriate). This would select their tab as soon as malcontent-control is unlocked.

added malcontent-control label

changed milestone to %0.10.0

mentioned in commit db54baf9

mentioned in merge request !95 (merged)

Fix available in !95 (merged).

Next step is to modify gnome-control-center to pass --user $USERNAME.

Next step is to modify gnome-control-center to pass --user $USERNAME.

Done: https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/863

closed with merge request !95 (merged)

mentioned in commit 540c337a