Partial Joomla 1.6.0 beta 6 compatibility

• Fix a problem to reset the DB error number and that we put in a new Multisites Database adapters
• Fix the submenu display after that Joomla change the behavior in beta 6

Improve the Front-End website creation

• Always check the validity expiration to be able redirect the user to the expired URL when it is present;
• Improve some SEF url when redirecting the user to other multisites actions.
  There is still a know problem when editing a slave site from the list of slave site and when the SEF is enabled.
  In this case, the data are not send by the form to the server. Use a normal input submit button instead of the joomla javascript submitform routine can solve the problem.
• Fix some minor HTML syntax error when editing a Front-end website definition.
  A table row TR were not correctly closed.

Bundled with Jms Multisites Patch definition 1.2.41

• Modify the SH404SEF patch to be complient with version 2.0.
  Some patches where moved into other files after they have refactor their code to use MVC.
• Add JMS Tools (install) definitions for :
  - Multisites patches for Mighty,
  - Disqus Comment System for Joomla!,
  - Scribe,
  - SEF Title Prefix and Suffix,
  - some sh404SEF plugins,
  - Simply Links,
  - WysiwygPro3