[ENH]Replicate this checkbox also in the structures section, as it was expected to be found there also (I'm a big fan of structures and I didn't know about this option!)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47616 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] Use the i18n icon on laguage page + add a short top description

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47617 b456876b-0849-0410-b77d-98878d47e9d5