Initial commit.
Added new color variables.
Making active line number bg darker based on @njx's feedback.
Applied active line styling to Inline Editors based on @peterflynn's feedback.
Fixed line number color bug.
Fixed a nasty bug based on @njx's feedback.
Fix up CM submodule
Merge branch 'master' into larz/active-line
Merge pull request #6399 from adobe/larz/active-line

"Highlight active line" improvement