Item12481: working towards a final 4.0

- fixed DEPENDENCIES
- removed support for old foswiki-trunk-slideshow
- fixed detection of IE11 
- simplified js code to initialize the skin
- color aind typography adjustments
- fixes to user profile pages
- simplified web creator
- use classification template web if ClassificationPlugin is installed
- bring back topic actions for native user groups
- improved format of mail notifications
- fixed language selector
- simplified rename dialog
- improved 404 dialog



git-svn-id: http://svn.foswiki.org/trunk@17457 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12806: correctly look for TIDY file. Make testing without a log message easier

git-svn-id: http://svn.foswiki.org/trunk@17458 0b4bb1d4-4e5a-0410-9cc4-b2b747904278