Nicer default for the group header background.
Nicer default for the group header background.

svn path=/trunk/KDE/kdepim/; revision=909103

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