Don't create translated special collection otherwise it will create on disk...

Don't create translated special collection otherwise it will create on disk translated folder not very good

but the real bug is that it will try to create 2 "inbox" one translater another inbox in C language.
=> it will crash at the beginning and will create bug reported where kmail doesn't start because there is 2 inbox.

We have a function which change displayname so not necessary to create theses folders as translated.

Tested and it works better :)