message: Add style prop to ModalBody
diff: +import { Interpolation } from 'emotion'
  import * as React from 'react'
  import { withStyles, WithStylesProps } from '../../../styles'
  export interface ModalBodyProps extends WithStylesProps {
  + style?: Interpolation
  }
  @withStyles
  export class ModalBody extends React.PureComponent<ModalBodyProps> {
  render() {
  - const { css } = this.props
  + const { css, style } = this.props
  const styles = {
  body: {
  padding: '2.5rem',
  },
  }
  return (
  - <div className={css(styles.body)}>
  + <div className={css(styles.body, style)}>
  {this.props.children}
  </div>
  )
  