fix HTML structure by rmv. obsolete input end tag

apps/files/templates/appnavigation.php

@@ -10,7 +10,7 @@
 		</div>
 		<div id="app-settings-content">
 				<h2><?php p($l->t('WebDAV'));?></h2>
-				<div><input id="webdavurl" type="text" readonly="readonly" value="<?php p(OC_Helper::linkToRemote('webdav')); ?>"></input></div>
+				<div><input id="webdavurl" type="text" readonly="readonly" value="<?php p(OC_Helper::linkToRemote('webdav')); ?>" /></div>
 				<em><?php print_unescaped($l->t('Use this address to <a href="%s" target="_blank">access your Files via WebDAV</a>', array(link_to_docs('user-webdav'))));?></em>
 		</div>
 	</div>