[#32696] Fix small issue with method saveorder in feature model

The feature model not have support for UCM, then show a error like:

PHP Notice: Trying to get property of non-object in .../libraries/legacy/model/admin.php on line 1143

To solve I rewrite the method saveorder without UCM support.

Tracker: #32696

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32696&start=0