[REF] Conversion of more wizard pages to use Bootstrap layout and grid divs.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51563 b456876b-0849-0410-b77d-98878d47e9d5
[REF] Added thumbnail class to screenshot thumbnail images. Todo: Replace hard-coded px widths with grid and responsive-image classes.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51564 b456876b-0849-0410-b77d-98878d47e9d5