(#62) Styling: extend mixin to equal col height for different widths
(#62) Changelog.
Merge branch 'feature-0.13.x/62-styling--extend-mixin-to-equal-col-height-for-different-widths' into release-0.13.x

* feature-0.13.x/62-styling--extend-mixin-to-equal-col-height-for-different-widths:
  (#62) Changelog.
  (#62) Styling: extend mixin to equal col height for different widths