fix for headers tab, thanks to Karl-Heinz Zimmer <khz@kde.org>
fix for headers tab, thanks to Karl-Heinz Zimmer <khz@kde.org>

svn path=/trunk/kdenetwork/doc/kmail/; revision=106118

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