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
Update course session catalogue design - refs #7275
Add function to get name tools from category course - refs #7275
merge
Fix misplacement of $action variable processing - refs #7275
Minor - code indentation - refs #7275
Merge branch 'AngelFQC-7275' into 1.9.x
Update translations