(#59) Styling grid: Cleanup
Merge branch 'feature-0.12.x/59-styling-grid--fix-width-of-a-single-col-in-a-row--cleanup' into release-0.12.x

* feature-0.12.x/59-styling-grid--fix-width-of-a-single-col-in-a-row--cleanup:
  (#59) Styling grid: Cleanup