R1:a211f977375d

Conpherence - some widget and display stuff

Summary:
this was originally "just" adding the icons like I had bundled into D4790. It morphed a bit though and does a few things

- adds the icons
- cleans up widget CSS generally a bit so scrolling always works
- phutil_tag -- probably was a bad idea but I wanted to play with it. I think its harder to not break conpherence when you land the branch now maybs. Still up for fixing it immediately post land though.

Test Plan: played with conphernece a bit. Used…