Adds more methods to content classes
Adds unload method to cms_content_cache class
Cleanup of cms_content_tree class
Cleanup of search actions
  - remove indexing of templates
  - cleanup text in content
UI improvements in design manager (templates tab) particularly wrt to tooltips and locking.


git-svn-id: http://svn.cmsmadesimple.org/svn/cmsmadesimple@8856 3d254a34-79dc-0310-9e5f-be208747d8a0