Issue #405
Close all accordions when step into admin or click oscommerce logo

Signed-off-by: Gergely <t-gely@freemail.hu>

* Replace defined icons with jQuery UI Accordion default icons
* Minor optimization
Set languages for google modules

Signed-off-by: tgely <t-gely@freemail.hu>

Don't overwrite window.___gcfg.lang if it already exists
Only include language files and module files if they exist