RFC: Tab, allow custom menuItem

[traverse]

The new Tab component is awesome but sometimes instead of the plain text menu item you might want to add for example a Label component to it.

It does currently works if you do the following:

import React from 'react'
import { Label, MenuItem, Tab } from 'semantic-ui-react'

const panes = [
  {
    menuItem: <MenuItem>Tab1<Label>2</Label></MenuItem>,
    render: () => <Tab.Pane>Tab 1 Content</Tab.Pane>
  }
]

const TabExampleBasic = () => (
  <Tab panes={panes} />
)

export default TabExampleBasic

You do however get a prop type warning. I'm not sure if it's just a matter of changing menuItem: PropTypes.string.isRequired to menuItem: PropTypes.node.isRequired or if any other changes are required.