You know what folks, a lot of Mercurial merges failed, and I just now figured out why. So now all changes from stable are permanently synced in.
// UK lang variables
tinyMCE.addToLang('',{
insert_advhr_desc : 'Horizontale rule',
insert_advhr_width : 'Width',
insert_advhr_size : 'Height',
insert_advhr_noshade : 'No shadow'
});