Allow different widths for steps - to allow wider code window

**Is your feature request related to a problem? Please describe.**
Be great to have a wider input area (when using a widescreen monitor)

**Describe the solution you'd like**
Either have code space be responsive or have option to go full width

**Do you have a workaround?**
Not really - but obviously issue is a small enhancement, not showstopper.

**Comparable features in other tools?**
confluence tables is a nice component with different widths.