component-animations.less in bootstrap-on-rails-3.3.1

- old
+ new

@@ -15,17 +15,20 @@
   }
 }
 
 .collapse {
   display: none;
+  visibility: hidden;
 
-  &.in      { display: block; }
+  &.in      { display: block; visibility: visible; }
   tr&.in    { display: table-row; }
   tbody&.in { display: table-row-group; }
 }
 
 .collapsing {
   position: relative;
   height: 0;
   overflow: hidden;
-  .transition(height .35s ease);
+  .transition-property(~"height, visibility");
+  .transition-duration(.35s);
+  .transition-timing-function(ease);
 }