CSPACE-5867 Added safety check in Vocab search to ensure that mis-match resources do not lead to inadvertent searches. This is a vulnerability with the Trie model, so closed it a hole here. Also added support to search for media related to vocab items, since it is not inconceivable that media would be related to a person, org, or concept, and this is simpler that fixing the UI at this point. Precludes the large searches that were happening as a result of these holes.