/indra/newview/skins/default/xui/en/widgets/inbox_folder_view_folder.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<inbox_folder_view_folder
  folder_arrow_image="Folder_Arrow"
  folder_indentation="8"
  item_height="20" 
  item_top_pad="4"
  selection_image="Rounded_Square"
  >
	<new_badge 
        label="New" 
        label_offset_horiz="-1"
        location="right" 
        padding_horiz="12.5" 
        padding_vert="2"
        location_offset_hcenter="-23"
        border_image="New_Tag_Border"
        border_color="DkGray2"
        image="New_Tag_Background"
        image_color="Black"
        />
</inbox_folder_view_folder>