As a Lean Project Coordinator
I would like a horizontal scrollbar on JIRA Agile Kanban Board
So that the number of columns (value stream stages) can grow to any number

I believe the original request for the Scrum rapid board was fair as much as this one.

Ideally JIRA Agile should support a configuration that allows fixed board or scrollable board.

In the meanwhile we can use one of the hacks I described in http://thinkinginsoftware.blogspot.com/2013/11/jira-agile-extended-kanban-board.html which involves modifying the style after the page is rendered via a script that can be run from a browser plugin like https://github.com/nestoru/tampermonkey-jira-extended-rapidboard