[FIX]Fix the color for the links corresponding to the unavailable wizard pages because of disabled dependencies, expect for the first one (Personal Information) to bring the opportunity to the admin user to enable at least the user preferences feature.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49756 b456876b-0849-0410-b77d-98878d47e9d5
[MRG] Automatic merge, branches/12.x 49753 to 49756

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49757 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Add the missing icon the User Messages section (the only section that was without icon). Reusing some gif in the icons folder.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49758 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Add the missing icon the User Tasks section ('another' section that was without icon). Reusing some gif in the icons folder.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49759 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Disable time zone selection in user preferences if the site-wide setting is to enforce the site timezone for all users

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49760 b456876b-0849-0410-b77d-98878d47e9d5
[MRG] Automatic merge, branches/12.x 49756 to 49760

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49761 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] adjusting boostrap.css location for the installer as it changed in the vendor directory

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49763 b456876b-0849-0410-b77d-98878d47e9d5