Fix bug #118521 (empty article viewer ignores background color setting).
Fix bug #118521 (empty article viewer ignores background color setting).

CCBUG: 118521

svn path=/trunk/KDE/kdepim/knode/; revision=490894

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