Fix display of long attachment names in new header style.
Fix display of long attachment names in new header style.

svn path=/branches/kdepim/enterprise/kdepim/; revision=717285

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