R1:0094343556c2

Conpherence - move crumb-based room edit to widget; other cleanup

Summary:
We use a non-standard way to invoke the edit dialogue (title, picture, etc) via the crumb. Stop doing that and instead use the widget technology to invoke the dialogue.

This requires making the widget handling code a bit more nuanced as nothing has wanted to pop a dialogue before. I plan to clean this up as I add the action to "Mark as Favorite" to the UI. In particular, I want to stop rendering the un-used DOM and make a workflow…