Anki add-on: adjust some colors in the stats window

this add-on allows you adjust some colors in the stats window, e.g. the yellow that's used for suspended cards or the dark green that's used for mature cards, etc. This add-on allows you to override the default values set in anki/stats.py . After changing the configuration you need to restart Anki so that changes take effect. made by request. use it at your own risk.