Merge request compare screen regressions with dark theme
There are few noticible regressions with dark theme for the code highlighter. They also behave differently in Firefox and Chrome (in Firefox it's a bit better).
What is wrong:
- In Chrome it's not using the correct background for the diff highlight
- In both there is a transparent line from the top of the sticky file header that, when you roll the code part, leaks the content below, displaying an ugly dark line as if it was a border.