WB 2.08.x

+ add Page extended to settings,
! to show experten mode in page settings
! shows some more settings like icon dir

1. fixed admin/settings, remove unknown variables

! update folder admin/settings admin/skel/htt
! change Template to div container

1. validation fix in print_footer, class.database
   ! replace settings and default header

! settigs.php add fields dev_infos and page_icon_dir
+ add developer info to footer
! update class.admin.php, footer.htt

some validation fixes in backend

+ move admin/themes/templates/ to admin/skel/themes/htt/
! and update class.wb.php, upgrade-script.php