[bp/r51565][FIX]Fix PHP Notice:  Undefined variable: tikiroot (at least when running console to install the db)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@51566 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Remove info from Tiki13 from the Upgrade Wizard in upgrades to Tiki12. Not a backport because it's in Tiki13 where that iframe needs to be shown.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@51567 b456876b-0849-0410-b77d-98878d47e9d5