[CSS] Updated column CSS to match the behaviour of the position CSS.
Date picker polyfill: Fixed closing on previous menu click (fixes #3869)
Merge pull request #4205 from pjackson28/datepickerfix

Date picker polyfill: Fixed closing on previous menu click (fixes #3869)
Merge pull request #4204 from thomasgohard/css-columns

[CSS] Updated column CSS to match the behaviour of the position CSS