indent folders in add dialog

templates/part.folderlist.php

@@ -1,6 +1,6 @@
 <?php
 	function print_folder(OC_News_Folder $folder, $depth){
-		echo '<li class="menuItem" onclick="News.DropDownMenu.selectItem(this, ' . $folder->getId() . ')">' . strtoupper($folder->getName()) . '</li>';
+		echo '<li style="margin-left:' . 10*$depth . 'px;" class="menuItem" onclick="News.DropDownMenu.selectItem(this, ' . $folder->getId() . ')">' . strtoupper($folder->getName()) . '</li>';
 		$children = $folder->getChildren();
 		foreach($children as $child) {
 			if ($child instanceOf OC_News_Folder){