When a custom debugger plugin is used, order of the css compilation changes and causing wrong display on a forked debugger with retina display.
Removing this important flag solves the issue.
I have not seen any side effects of removing this important flag
* fixes acitve background colors for "Run" and "Preview" buttons.
* fixes hover background color for breakpoints in "Breakpoints" panel.
* fixes color for box showing when hovering keywords while debugging.