Add touchstart handler in ItemView

src/navigator/view/ItemView.js

@@ -9,6 +9,7 @@ let ItemsView;
 module.exports = Backbone.View.extend({
   events: {
     'mousedown [data-toggle-move]': 'startSort',
+    'touchstart [data-toggle-move]': 'startSort',
     'click [data-toggle-visible]': 'toggleVisibility',
     'click [data-toggle-select]': 'handleSelect',
     'mouseover [data-toggle-select]': 'handleHover',
@@ -222,10 +223,11 @@ module.exports = Backbone.View.extend({
    * @param	Event
    * */
   startSort(e) {
+    console.log('starting startSort', e.type);
     e.stopPropagation();
     const sorter = this.sorter;
     // Right or middel click
-    if (e.button !== 0) return;
+    if (e.button && e.button !== 0) return;
     sorter && sorter.startSort(e.target);
   },