Comments to activities
It could be useful to be able to add comments to an activity. In the database there's a column to store comments, so it should be easy to add that information: https://gitlab.gnome.org/danigm/timetrack/blob/master/timetrack/db.py#L23
A first version can be to add a simple GtkTextView field to the edit dialog and populate and store that information: https://gitlab.gnome.org/danigm/timetrack/blob/master/timetrack/edit.py