NumericInput selects text when used in a Dialog

[tgreen7]

Environment

• Package version(s): 3.9.0
• Browser and OS versions: chrome 70.0.3538.110, mac os 10.14.1

Steps to reproduce

class App extends Component {
  render() {
    return (
      <div className="App">
        <Dialog isOpen>
          <NumericInput />I am some text
        </Dialog>
      </div>
    );
  }
}

Actual behavior

https://github.com/tgreen7/blueprint-numeric-select-text

Expected behavior

To not select text

[giladgray]

duplicate of #3004