Improved Tasks and Groups Management

If a user has rights to manage all tasks, the 'Group' counter in the status bar shows all tasks, even from groups the user is not a member of. We have improved this. The 'Group' counter now shows the number assigned to groups the user is a member of. In addition, the search option 'My tasks' has been added. If this search option is enabled, all tasks assigned to groups of which the user is a member are shown. In this way, the user with rights to manage all tasks can arrange the overview in such a way that only the tasks of their own groups are shown.