[i18n] IMP: Check folders for new mail

[Tornoci Laszlo]

Hi,

in IMP|Folders after marking one folder, and selecting the action: Check 
Folder(s) for New Mail, you get the confirmation message:
You were successfully subscribed to "foldername".

In my opinion, this is not a good confirmation message, some people may 
actually think this is the same as the IMAP subscription mechanism (it 
is clearly not). It is quite ackward to translate as well, for the same 
reason.

I suggest to change to confirmation message (lib/Folder.php:510)
to this:
Folder %s will be checked for new messages.

                              Yours: Laszlo