Modal: Support showing Close (X) Icon

[brsanthu]

It would be nice if we can specify a prop to show close (x) icon on the top right corner, which would close the model and fires onClose or onHide.

[levithomason]

I'd merge a PR for this. It should be very easy since we already have close listeners setup. We'd just need to include an icon prop and add the close handler. Probably default the icon to close but allow it to be configured via props.

[brsanthu]

@levithomason you are so fast :)

What you say makes sense. I will try to take a look and create a PR.

[levithomason]

I hate waiting :/ So, I hate making ppl wait 🎉