[FIX} Adjust navbar-inverse background to match the custom color used at Tiki project sites, so the  Social networking layout will have it by default. Todo: the other options.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52219 b456876b-0849-0410-b77d-98878d47e9d5
[FIX} Add the "please choose a theme option" message to the Social network layout also.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52220 b456876b-0849-0410-b77d-98878d47e9d5