LDEV-4507 Use DTOs instead of entities as page attributes It seems that using entities as page attributes outside a transaction causes undesired effect. Portrait tag fetches data from DB and existing entities, including group participants, get flushed from session. It overwrites changes made by learners being added to a group.
LDEV-4472 Fix Javascript error on accessing a Grouping activity Since <i name="ui-${user.userId}" class="fa fa-xs fa-user"></i> <c:out value="${user.firstName}" /> <c:out value="${user.lastName}" /> was removed in one of the previous commits, this peace of Javascript also needs to be taken care of.