Language option is saved on change.

The selector works and looks similar to Sections
panel's default section widget.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5277 2fea6a4d-a838-0410-917b-93a53c48e9d2
Removed extra linefeed.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5278 2fea6a4d-a838-0410-917b-93a53c48e9d2