MediaFileManager:Add Media File

Build 3202 on jardakotesovec:review_multiselect
Reviewing disabled
Baseline History
Build 320241d7e06
Current build. There are unaccepted changes, so build 3192 is still the baseline.
Build 319284fbf9e current baseline
Accepted by Blesilda Ramirez.
Commenting is disabled because there's a newer build on this branch