Merge pull request #1125 from BeatC/small-avatar-images

Fixed problem with resizing thumb avatars

css/_mixins.scss

   @include transform(translate(-50%, -50%))
 }
 
+/**
+* Defines the maximum width and height
+**/
+@mixin maxSize($value) {
+    max-width: $value;
+    max-height: $value;
+}
+
 @mixin transform($func) {
   -moz-transform: $func;
   -ms-transform: $func;

css/_videolayout_default.scss

 }
 
 .userAvatar {
-    @include circle(60px);
+    @include maxSize(60px);
+    @include circle(50%);
     @include absoluteAligning();
 }