Advertise all underlying propTypes and typings in wrapper components

See #1163 for the inspiration here.

Some components wrap others, like a Popup wrapping a Portal. However, we do not advertise the Portal props as propTypes nor typings of the Popup. This means there is no way for users to know what props are available.

Add propTypes

I propose we explicitly list all known props in propTypes and typings of the underlying component when a component wraps another component.

Add Examples

We should then also add doc site examples showing use of these props. Example, Popup mouse enter/leave delays are not shown but are available as it composes the Portal which has mouse enter/leave delays.

Task List

Here is a brain dump of wrapper components, there may be more. @jcarbo / @layershifter feel free to update this list at will:

• Popup -> Portal
• Modal -> Portal
• Confirm -> Modal
• Select -> Dropdown
• Radio -> Checkbox
• Table.Footer -> Table.Header
• Table.HeaderCell -> Table.Cell
• Form.Button -> FormField + Button
• Form.Checkbox -> FormField + Checkbox
• Form.Dropdown -> FormField + Dropdown
• Form.Input -> FormField + Input
• Form.Radio -> FormField + Radio
• Form.Select -> FormField + Select
• Form.TextArea -> FormField + TextArea