LDEV-1733: Allow teachers to add any number of groups to a chosen grouping, irrespective of the max number set in authoring. If they do add more than the max number, then the max number column is set to null (and not 0) as this matches what authoring expects.
LDEV-1731: Use "yes" and "no" rather than tick and cross for indicating marking done, as tick and cross may indicate pass/fail rather than done/not done
LDEV-1731: Use "yes" and "no" rather than tick and cross for indicating marking done, as tick and cross may indicate pass/fail rather than done/not doneLDEV-1707: Change marks to display 2 decimal places rather than 1.