Fixes about 20 bugs in WebGUI 7.4.

 - fix: misspelled i18n in webgui password recovery
 - made captcha's harder to defeat by machine
 - rfe: Make Layout Templates use separate namespace (News)
 - rfe: search assets on class without keywords
 - fix: thumbnailer.pl is broken
 - fix: workflow engine reporting "error" in status screen even when it's
   "waiting"
 - fix: crash bug in if modified cache checking
 - rfe: Change URL of "news" layout to be something else.
 - add type variable to Data Form record loop
 - fix: Select All button javascript would not work in IE
 - fix: Events were missing startDateMonth and endDateMonth template vars
 - fix: Fixed a bug which caused assets to be uneditable if their edit group 
   had been deleted. (Martin Kamerbeek / Oqapi)
 - fix: Events don't display on last day of week on week view
 - fix: Data Form tab delimited export doesn't obey field order
 - fix: Extra <a> tags inserted when viewing only Wiki page
 - fix: incorrect links generated for Event related links
 - fix: Sort Collaboration System threads correctly by rating
 - fix: Newsletter contains trashed threads (Yung Han Khoe, United Knowledge)