Change color of success notification to green

[sarahsga]

"Success" feedback is usually shown in green. The success notification container should be green instead of the current pale yellow

[itsdevdom]

Oh my, there are my red-green visual impairments showing off - any ideas for a better success color? Maybe even better colors for the other notification types?

Happy to get some ideas!

[itsdevdom]

Released version 1.0.6 with the color changes. Thanks again for contributung!