Item12485:

   * added js to derive the topic title from various formfields while creating a topic
   * removed some unused topics
   * fixed thumbnail renderer to allow svg thumbs as well as supported by ImagePlugin
   * using %varible{default="foo"}% syntax where possible
   



git-svn-id: http://svn.foswiki.org/trunk@16692 0b4bb1d4-4e5a-0410-9cc4-b2b747904278