Merge pull request #871 from christianp/ko-deferred-tasks-fix

knockout: run deferred tasks early

knockout-sortable.js

@@ -157,6 +157,8 @@
                     // Force knockout to update
                     from.valueHasMutated();
                 }
+                // Force deferred tasks to run now, registering the removal
+                ko.tasks.runEarly();
                 // Insert the item on its new position
                 to().splice(newIndex, 0, itemVM);
                 // Make sure to tell knockout that we've modified the actual array.