make sure to import perfect scrollbar plugin before our own mixins

otherwise it overrides the border-radius mixin with an incompatible one

app/assets/stylesheets/application.css.scss

 @import "compass";
+@import "perfect-scrollbar";
+
 @import "colors";
 @import "ui";
 @import "_mixins";
@@ -24,7 +26,6 @@
 @import "tag";
 @import "photo";
 
-@import "perfect-scrollbar";
 
 /* ====== media ====== */
 .media {

app/assets/stylesheets/new-templates.css.scss

+@import 'perfect-scrollbar';
+
 @import "colors";
 @import 'mixins';
 @import 'new_styles/new_mixins';
 @import 'new_styles/variables';
-@import 'perfect-scrollbar';
 
 /* core */
 @import 'flash_messages';