[bp/r48193][ENH] CodeMirror upgraded to latest stable version (3.16).

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48255 b456876b-0849-0410-b77d-98878d47e9d5
[Revert/r48255][bp/r48193][ENH] CodeMirror upgraded to latest stable version (3.16).

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48256 b456876b-0849-0410-b77d-98878d47e9d5