Use localStorage, fallback to cookie, remove jquery.jStorage RL dependency

As per comments in I22613d9f6846db5456beb532cec47396fccda8ae

Change-Id: I09b2bd52972d9aef20dd469c556631e0299bc407

Resources.php

@@ -140,7 +140,6 @@ $wgResourceModules['ext.uls.preferences'] = array(
 	'dependencies' => array(
 		'mediawiki.user',
 		'mediawiki.api',
-		'jquery.jStorage',
 	),
 ) + $resourcePaths;