Add media reference information to inspector

[timlehr]

Currently the inspector doesn't show any information on the media references. It would be nice if we could expose information on all media references there too (target_url, available_range, metadata, image_bounds, ..)

[jspada200]

I can take this!

[jspada200]

This is probably taking me much longer then someone who works in c++ daily but was able to get a dropdown going of the media refs on a clip. Working on populating the info and dealing with reseting the selection when clicking on a new clip

[timlehr]

Nice! This is already really cool! 👏

I think there could even be an argument made, switching that combobox value should edit the active representation on the in-memory OTIO media reference. What do you think @jminor?

[jminor]

This is a great start! It would be helpful if all the media reference properties were displayed also, not just the target URL.

Maybe the combobox could let you pick the active one, but all of them could be listed in detail below that. That way it is less clicking to look at them all, but you can still pick the active one easily?

If you think those enhancements would be better as a follow-up PR that's fine too. It's up to home much time you have to work on this.

[jspada200]

Thanks Guys! I only have a few hours today to work on this but I will do what I can.