Add support for URLs in element detail descriptions

[tenfef]

I had a go at this. Is a bit of a pain in the ass as we need to make it a UITextView instead of a UILabel.
I'm not sure a good technique for autosizing the container based on a variable text length.

Also we should probably get rid of the tableview approach and just have separate views, but then we need to make sure everything flows correctly, which UITableView is good at.