change disabled dragHandle-color

app/assets/javascripts/components/ElementContainer.js

@@ -20,7 +20,7 @@ class ElementContainer extends Component {
   render() {
     const {connectDragSource, sourceType} = this.props;
     if(sourceType == "") {
-      return <span style={{fontSize: '18pt', cursor: 'not-allowed'}} className='text-muted fa fa-arrows'></span>;
+      return <span style={{fontSize: '18pt', cursor: 'not-allowed', color: 'lightgray'}} className='fa fa-arrows'></span>;
     } else {
       return connectDragSource(
         <span style={{fontSize: '18pt', cursor: 'move'}} className='text-info fa fa-arrows'></span>,