Add "hide closed versions" option to Gantt charts.
I have created this patch for the gantt charts to hide the closed versions on the gantt.
This is a hard-coded fix. I'd like to know more about Ruby so we could add an entry on the main administration settings panel (or project settings panel) to provide a checkbox that says [ ] Hide closed versions on gantt.
Anyway - here is the patch file I created, which is not the preferred implementation as it changes the base behavior without the user knowing.