* Markdown and Repo header tweaks
- Use CSS vars for all markdown colors
- Tweak repo header, removing double borders and adjust sizes
- Use menu instead of buttons for issue open/close switcher
- Add emoji inversion for select emoji glyphs in arc-green
- Use border over box-shadow for all buttons
- Add spacing element to login form without openid
* repo settings navbar fix
* use shared template in more places and adjust dashboard
* fix remaining open/close combos
