Portal support

[shubhanus]

It's better to give portal support for the popover. Some time height is less in what we are showing date picker that popover we can't control z-index if we give portal support that will solve these issues.

[felixakiragreen]

What would be involved in portal support?

[shubhanus]

For Rendering children into a DOM node that exists outside the DOM hierarchy of the parent component.

https://reactjs.org/docs/portals.html

It's just simple implementation.