LDEV-1042: Allow users to be added to staff group and learner group in a lesson class after the lesson has started. Code has been written for both the LAMS monitoring interface + integration. Neither set of code is tested yet - need the clients to test it.
change 'course admin/manager' in db to 'group admin/manager' so users don't have to say 'course admin/manager' when specifying roles in a spreadsheet ('course' replaced by 'group').
latest compile after fixing the bug related to start date time showing back o back of schedule date fields when lesson is in Created but not started mode.