Speed up "Find Messages" dialog (forwardport of 588915)
Speed up "Find Messages" dialog (forwardport of 588915)

svn path=/trunk/KDE/kdepim/; revision=588996

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