fixed seenAction, don't use sent PK, as that's a security risk, just mark all for that user and group as seen
fixed seenAction, don't use sent PK, as that's a security risk, just mark all for that user and group as seen

lino-framework/lino,lino-framework/lino,lino-framework/lino,lino-framework/lino,lsaffre/lino,lsaffre/lino,lino-framework/lino,lsaffre/lino,lsaffre/lino,lsaffre/lino