* Code review UI improvements

* More fixes to dark theme

* Style fix

* Fix to allow add code review comments only on review files tab

* More readability dark style fixes

* Fix commenting on deleted files. Fixes #4752

* Fix line blame getting for multiple corner cases

* Resolve some issues with Arc Green

* Fix editor styles

* zeebra stripes

* generate CSS file

This makes it easier for user who want to theme but
don't have the ability to know how to customize templates
all that is required is a change in a config option

The reason why I chose the DEFAULT_THEME as variable,
as perhaps in the future we will allow users to chose their
theme whon logged in just like we do with languages