* UI customizations: new features
Fixes#2905
* colors for graphs
* introduce env variable
* colors for topbar, stats, selected state and tabs
* fix build
* fix validator
* refactor link.primary.hover color token
* refactor selected colors
* update styles for switch and fix some color tokens
* change color for selectable controls
* icon color tokens refactoring
* UI customizations: new features
Fixes#2905
* test for common components
* tweaks
* migrate from color-mode-hex cookie to color-theme cookie
* clean up
* update screenshots
* more screenshot updates
* update default color of chart line
* update envs for mega eth
