[DatePicker] Call setState-muiTheme in componentWillReceiveProps

[ntgn81]

DatePicker does not update state.muiTheme on componentWillReceiveProps, resulting in the child component (TextField) not receiving updated theme values.

Side note - would this conditional way of calling this.setState save a few milliseconds of calculation as compared to calling this.setState{muiTheme:...} without any checks like in all other components?

// Taken from flat-button-label.jsx
  componentWillReceiveProps(nextProps, nextContext) {
    let newMuiTheme = nextContext.muiTheme ? nextContext.muiTheme : this.state.muiTheme;
    this.setState({muiTheme: newMuiTheme});
  }

[oliviertassinari]

Side note - would this conditional way of calling this.setState save a few milliseconds of calculation as compared to calling this.setState{muiTheme:...} without any checks like in all other components?

That's better 👍, but we plan to use an HOC to pass the muiTheme as a property to the components
#2493

[oliviertassinari]

@ntgn81 Thanks!