use the same oxygen icon for kmail binary as the one which is set for main window
use the same oxygen icon for kmail binary as the one which is set for main window

svn path=/trunk/KDE/kdepim/; revision=794675

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