backport SVN commit 830681 by winterz:
backport SVN commit 830681 by winterz:

cleanup the list of available summaries, and make the initial layout sane.
also add a QSpacerItem so the right column can't ever become "invisible".

BUG: 166136

svn path=/branches/KDE/4.1/kdepim/; revision=830683

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