Set the correct content mime types for newly created IMAP folders.
Set the correct content mime types for newly created IMAP folders.

svn path=/branches/work/akonadi-ports/kdepim/; revision=996350

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi