Do not use filters in fade animations

Author: Tomás Arribas

less/component-animations.less

@@ -2,10 +2,10 @@
 // --------------------
 
 .fade {
-  .opacity(0);
+  opacity: 0;
   .transition(opacity .15s linear);
   &.in {
-    .opacity(100);
+    opacity: 1;
   }
 }
 
@@ -17,4 +17,4 @@
   &.in {
     height: auto;
   }
-}
+}