Better representation support

There is rather minimalistic way to see more info about individual representations.

This should be updated and/or enhanced - show more info about the represenation, like path. prouctType doesn’t make sense here anyway. As a next step, representations should be enhanced with representation traits data - these representations store metadata on the server about their content, from video codecs to scene scale. These can be later on used for search, etc. But for that, we’ll need more representations integrated this way, so that’s another stage.