Updating css base conflict with didactic progress in using accordion, which is displayed within the current

Conflicts:
	main/css/chamilo/default.css
add img icons windows_list update

Conflicts:
	main/img/icons/32/window_list.png
	main/img/icons/48/window_list.png
	main/img/window_list.png
	main/template/default/auth/sessions_catalog.tpl
siderbar well update
Improve the view of list courses - refs #7275