[imp] Shared Folders.shared

[Martin]

Hi all,

still testing a fresh IMP 4.2 with a cyrus imapd. If the shared folders are 
displayed in a separate folder (folder display option), the folder tree 
gets a blind entry for "shared". That way, folders shared.folder1, 
shared.folder2, etc. become:

- Shared Folders
    shared          <-- not linked and always the first entry
  + folder1
  + folder2
  ...

I guess it´s a bug and "shared" should not be displayed as there is only 
this one shared space. "Other Users´s Folders" seem to work fine 
displaying the usernames and nesting their folders accordingly.

Using "Combine all namespaces" works as expected.

   Martin