D19728: [GridViewKCM] Fix implicit width calculation

[Kai Uwe Broulik]

broulik edited the test plan for this revision.

REPOSITORY
  R296 KDeclarative

REVISION DETAIL
  https://phabricator.kde.org/D19728

To: broulik, #plasma, mart
Cc: kde-frameworks-devel, michaelh, ngraham, bruns