[FIX] Make user wizard pages hidden, if the pre-requisites are missing

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@47829 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Add missing global

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@47830 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] One more missing global

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@47831 b456876b-0849-0410-b77d-98878d47e9d5