set max width on username - fixes #2627
set max width on username - fixes #2627

lyw07/kolibri,mrpau/kolibri,learningequality/kolibri,mrpau/kolibri,learningequality/kolibri,indirectlylit/kolibri,learningequality/kolibri,indirectlylit/kolibri,lyw07/kolibri,lyw07/kolibri,learningequality/kolibri,mrpau/kolibri,indirectlylit/kolibri,mrpau/kolibri,lyw07/kolibri,indirectlylit/kolibri