MP2-422: Changed behavior on Shutdown when an ImportJob is still running: we now first cancel the ImportJobs and only when they are all canceled (and therefore are in a stable state) we save them to disk. It was therefore necessary to split cancelation on the one hand and disposing on the other hand.
Added delete support to NetworkRA
Merge remote-tracking branch 'origin/FEAT_MP2-422_ImporterWorkerNewGen' into EXP_10AE_Update_1
Merge branch 'FEAT_MediaDelete' into EXP_10AE_Update_1