Tiny bug in Light theme

Love the new light theme. One (tiny) big found though - need to change grafana.light.css




The #fff value is a hold over from the dark theme, and as it is, causes the panel editor close button image to disappear (turn white on a white background) when hovered over.

Patrick pushed a fix for this to master just now: https://github.com/grafana/grafana/pull/11463

Thanks for reporting this (with such precise detail)!