R1:89ee928a51c7

Share rendering code for embedded votes and vote detail

Summary:
We have two separate pieces of rendering code and both are pretty ugly. Move them toward being more reasonable.

This could no doubt be improved:

- Getting a text style which was readable on both the dark and light bars was hard, maybe we should change the colors or maybe I am just bad.
- Could probably benefit from actual competent design in general.
- JS magic is temporarily ineffective, I'll restore that in the future.
- Embed…