Addad a new basic theme (grey).

interface/lib/classes/listform.inc.php

interface/lib/config.inc.php

interface/web/themes/grey/icons/copy.png

interface/web/themes/grey/icons/folder.png

interface/web/themes/grey/icons/folder_closed.png

interface/web/themes/grey/icons/mail.png

interface/web/themes/grey/icons/paste.png

interface/web/themes/grey/icons/printer.png

interface/web/themes/grey/images/Nav_top_bg_2.png

interface/web/themes/grey/images/Thumbs.db

interface/web/themes/grey/images/bg_nav_1.jpg

interface/web/themes/grey/images/bg_nav_1.png

interface/web/themes/grey/images/bg_nav_2.png

interface/web/themes/grey/images/bottom.png

interface/web/themes/grey/images/btn_back.png

interface/web/themes/grey/images/btn_filter.png

interface/web/themes/grey/images/btn_left.png

interface/web/themes/grey/images/btn_next.png

interface/web/themes/grey/images/btn_right.png

interface/web/themes/grey/images/left_logo_1.png