Backport: Don't add [accept] etc when it's not an incidence as a freebusy mail
Backport:
Don't add [accept] etc when it's not an incidence as a freebusy mail

svn path=/branches/kdepim/enterprise/kdepim/; revision=950525

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