[KIL] layout.css: Remove empty layout.css and references to it (and some remaining lite.css bits)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@48548 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] bootstrap: Fix cluetips (insertionElement no longer needed)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@48549 b456876b-0849-0410-b77d-98878d47e9d5