Created by: PrajitR
Hovering on the "theme buttons" produces an imperceptible difference over the normal state (the border darkens slightly). This makes it difficult to see if you are hovering over a button or not. The fix just changes the gradient to a darker variation when hovering and/or active.
Issues #9879 (closed) and #9877 (closed)
(there's also an accidental white space change. sorry!)