Jms Multi Sites update:

- Fix "Elements compatibility" declaration to ensure that Joomla class are defined when called from Ajax.
- Verify that DB connection exists when computing the Admin user combo box (helper).
This avoid a Fatal Error when displaying the Front-End website creation on a template that has lost its DB (or slave site).

Bundled with Patch definition 1.2.74

• Add JMS Tools (install) definitions for :
  - Multisites Create Site module
  - Multisites Custom HTML
  - Accordion Menu for Joomla 1.7
  - Cassrina Slideshow Flo CSF6
  - Fix civiCRM
  - DJ-Image Slider
  - Fix DT Register definition
  - EasyCalcCheck PLUS
  - Event Registration Pro
  - JBolo
  - JB Login 2
  - JB MicroBlog
  - JV Framework
  - PayPlan
  - Superfish Menu (JT)
• Add Joomla 1.5 sharing definition for:
  - Event Registration Pro