change color with hover during dragging

browser/components/StorageItem.js

@@ -15,11 +15,13 @@ import { isNumber } from 'lodash'
  * @param {boolean} isFolded
  * @param {number} noteCount
  * @param {Function} handleDrop
+ * @param {Function} handleDragEnter
+ * @param {Function} handleDragOut
  * @return {React.Component}
  */
 const StorageItem = ({
   isActive, handleButtonClick, handleContextMenu, folderName,
-  folderColor, isFolded, noteCount, handleDrop
+  folderColor, isFolded, noteCount, handleDrop, handleDragEnter, handleDragLeave
 }) => (
   <button styleName={isActive
       ? 'folderList-item--active'
@@ -28,6 +30,8 @@ const StorageItem = ({
     onClick={handleButtonClick}
     onContextMenu={handleContextMenu}
     onDrop={handleDrop}
+    onDragEnter={handleDragEnter}
+    onDragLeave={handleDragLeave}
   >
     <span styleName={isFolded
       ? 'folderList-item-name--folded' : 'folderList-item-name'
@@ -54,6 +58,8 @@ StorageItem.propTypes = {
   folderName: PropTypes.string.isRequired,
   folderColor: PropTypes.string,
   isFolded: PropTypes.bool.isRequired,
+  handleDragEnter: PropTypes.func.isRequired,
+  handleDragLeave: PropTypes.func.isRequired,
   noteCount: PropTypes.number
 }