[Docs] Provide example for 'Any other properties supplied will be spread to the root element.'

[Izhaki]

Any other properties supplied will be spread to the root element.

This sentence shows up quite a bit in the docs.

I think it is worth linking this sentence, wherever it occurs, to some example (the one below may be a good candidate).

What do you think? And where should it go? Happy to PR it.

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It took me around 10 minutes to figure out how to disable the ripple effect on the default menu item.

As it turns out, MenuItem uses ListItem with the button set to true, and that button is considered the ListItem's 'root'. I had to look at the code for that.

So removing the ripple effect involved:

<MenuItem disableRipple onClick={ this.handleRequestClose }>Home</MenuItem>

Based on 'Any other properties supplied will be spread to the root element.', this works becaue of the root chain:

MenuItem > ListItem > Button

Which is rather genius, if you ask me.

[oliviertassinari]

I do think that #7983 help. I agree, we could add a section about it in the API page of the documentation and link it.