change font color of folder's article count when active

Author: Rokt33r

browser/styles/main/ArticleNavigator.styl

@@ -205,6 +205,8 @@ articleCount = #999
         background-color alpha(white, 0.05)
       &.active, &:active
         background-color alpha(lighten(brandColor, 25%), 70%)
+        .articleCount
+          color white
       .articleCount
         color articleCount
         font-size 12px