R1:6c5d98bb5eb2

Conpherence - fix a few bugs

Summary:
1) make the page title and uri update appropos to selected widget 2) make a behavior actually listen 3) fix the css so the button can always be clicked to edit metadata

Ref T3035 as I was trying to repro the metadata edit bug there and couldn't.

Test Plan: made the window small enought to have all the widgets visible and be in "device mode". noted page title and uri updated correctly from Conpherence and /conphernece/ to Thread Title and /conpherence/$id/ when…