Hi Cuboctahedron,

re:
> With the new groups, it would be nice to be able to make the side panel
> a bit wider. It could be done in terms of how many columns of buttons you have — I'd
> be happy to go to five or even six columns.

If you have Options > General > Scene browser position = "Adjacent" mode set so the scene browser is in its own pane you can make it as wide as you need by dragging its edge.

- Michael