Alignment issue with Button menu example

[robertjmccarthy]

What

Resolve alignment and padding issues with Button menu component example.

Why

On the fourth coded example of the Button menu documentation page ("Grouping buttons"), with no-JS, padding between secondary buttons is smaller than in other examples. Additionally, alignment of the secondary buttons with the primary button are skewed.

Who needs to be involved

• Developer

Done

When the example is checked by @robertjmccarthy (who experienced the alignment issue) and @helennickols (who experienced the padding issue) and both issues are resolved.

[chrispymm]

this is now fixed: