Allow easier column width setting and hiding in matrices

As a Solution Builder

I want a simple and obvious option to hide any column including the row headings column in a matrix

So That when trying to hide columns, I don't have to fiddle around with the right mouse button to spawn the width dialog, nor do I have to attempt to drag the column to set the width (which also doesn't always work and can be fiddly in a virtual environment). 

Benefits time/ease of use.

Acceptance Criteria 

1. I can easily hide ANY column with a yes/no option.
2. I can easily access the individual column widths of any column without having to accurately click on a tiny piece of the column heading.

Customer / Originator Giles Middleton

Priority Medium - usability.