Groups pop-up menu
After right-clicking on group list you will see following menu:
This item shows dialog window, for changing
group's hiding settings.
This button creates a new group.
This button removes a selected group from the list of registered ones.
Selects all lines of the list.
Unselects all lines of the list.
Set Activity Checkmarks
Sets activeness signs for all selected groups.
Reset Activity Checkmarks
Drops activeness signs for all selected groups.