Issue #2928851 by chr.fritsch, daniel.bosen, yogeshmpawar, jefuri, dagomar,...

Issue #2928851 by chr.fritsch, daniel.bosen, yogeshmpawar, jefuri, dagomar, seanB, marcoscano, phenaproxima, alexpott, borisson_: Allow the media source of a media type to be changed when creating a new media type