Suggestion: add support for passing id to button macro

[edwardhorsford]

I'd like to propose that the button macro accepts id as an optional argument. It feels like it might be good to add for consistency of api with other components - and considered for all compopnents.

I expected that all the macros would have a few standard arguments - like id, classes, etc.

Related slack discussion

Related component

Button

Context

Assumed that id was a standard part of the API and would exist on all components