[FIX] js various: Supply empty "defaultvalue" for prompt function - stops the word "undefined" appearing in IE

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@47978 b456876b-0849-0410-b77d-98878d47e9d5
[CSS] autoToc: Rounded corners for jqui

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@47979 b456876b-0849-0410-b77d-98878d47e9d5