Remove empty style/setting blocks
Add selection border and inactive selection colors.
Highlight variable.parameter (same as lang/other variables)
Change the color of markup tags.

Courtesy of FichteFoll. Blame him.
Update diff colors.

Courtesy of FichteFoll. Blame him.

- Give add/delete foreground colors.
- Add a generic markup.changed
Lighten the background of embedded sourcecode.

Courtesy of FichteFoll. Blame him.