fix sort icon if part or chapter

app/components/BookBuilder/Chapter.jsx

@@ -92,7 +92,7 @@ export class Chapter extends React.Component {
         style={listItemStyle}
       >
 
-        <div className={styles.grabIcon + ' ' + (chapter.division === 'body' ? styles.grabIconBody : '')}>
+        <div className={styles.grabIcon + ' ' + (chapter.subCategory === 'part' ? styles.grabIconPart : '')}>
           <i className='fa fa-circle' />
           <div className={styles.tooltip}>
             Grab to sort

app/components/BookBuilder/styles/bookBuilder.local.scss

@@ -188,11 +188,10 @@ $white: #fff;
       cursor: move;
       float: left;
       position: relative;
-      top: 6px;
       width: 3%;
     }
 
-    .grabIconBody {
+    .grabIconPart {
       position: relative;
       bottom: 5px;
       top: 0;