[FIX] wizard: Update the theme when you "save and continue"

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48337 b456876b-0849-0410-b77d-98878d47e9d5
[DOC] "About Unified Search Engines" remarkbox added on admin search page.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48338 b456876b-0849-0410-b77d-98878d47e9d5