Change visual design of hard-wrap setting?

[davelab6]

Similar to #4, in googlefonts/roboto-flex#403 there was confusion on the hard-wrap setting being an axis of that name, not a different kind of property than the axes settings. Maybe a color, different shape, etc could help to differentiate it?

[vikagrabowska]

I've just pushed V.0.95.2 where hard-wrap setting has white background to distinct it better from axis settings.