View all colliders in preview

In preview mode, it would be great to toggle all colliders on and off, showing them as wireframes or something subtle.

In older versions of the SDK (with Babylon), we had this and it was a huge help.
It used to work with pressing C
We need to see if we don't add C to the list of buttons to interact with.

Nice to have:
It would be ideal to have some kind of UI element to click to toggle this on/off
A key on the keyboard is hard to find and easy to forget.