Upstreaming from https://phabricator.wikimedia.org/T208434

Steps to reproduce:

1. Have a screen with 920px viewport width (or less).
2. Go to a project workboard with several columns and many tasks in the first column.
3. Try to quickly get to the task cards in the second column.

Actual outcome:
Scroll and don't miss the start of the next column while scrolling.

Expected outcome:
Be able to expand and collapse a column by clicking on the column header.