#857: + will-change on drag

Sortable.js

@@ -336,6 +336,7 @@
 
 					// Make the element draggable
 					dragEl.draggable = true;
+					dragEl.style.willСhange = 'transform';
 
 					// Chosen item
 					_toggleClass(dragEl, _this.options.chosenClass, true);
@@ -766,6 +767,7 @@
 					}
 
 					_disableDraggable(dragEl);
+					dragEl.style.willChange = '';
 
 					// Remove class's
 					_toggleClass(dragEl, this.options.ghostClass, false);