[fixed] OverlayTrigger improvement related to react-bootstrap#353 . Helps reduce browser reflows for lots of multiple OverlayTriggers being rendered at once. Before: http://i.imgur.com/e4UZ5l6.png , http://i.imgur.com/Tw39F9t.png After: http://i.imgur.com/bU0f7VY.png

Author: mtetlow

src/OverlayTrigger.jsx

@@ -119,7 +119,9 @@ var OverlayTrigger = React.createClass({
   },
 
   componentDidMount: function() {
-    this.updateOverlayPosition();
+    if (this.props.defaultOverlayShown) {
+      this.updateOverlayPosition();
+    }
   },
 
   handleDelayedShow: function () {