def: 7417 use enduserreportfilter for system reports, move all screentype ugly logic to a single point instead of duplicating it in 3 commands, add application filter to system reports.

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/front/workspaces/kmc/trunk@95096 6b8eccd3-e8c5-4e7d-8186-e12b5326b719