Add ref-forwarding to all Base and MSFT components

[nicholasrice]

It looks like React is deprecating ReactDOM.findDOMNode: https://reactjs.org/docs/react-dom.html#finddomnode

Our current reccomended to retrieve a DOM node is through that method, so I think we need to integrate ref forwarding into all of our components. While this should be pretty transparent for many components, there are several components that provide public properties on class instances, which we will need to provide alternate solutions for.

[shauntc]

+1

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[nicholasrice]

We could implement the innerRef model, where ref applies a ref to the component instance and innerRef applies a ref to the root DOM node.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[chrisdholt]

I believe this is slated for our next major version, not stale

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[chrisdholt]

closed by #3517