message: Fix being able to un-rotate images
  Since 0 is falsy, this made it impossible to return images to 0 degrees
  of rotation.
diff: @@ -122,7 +122,7 @@ export default class ImageView extends React.Component<IProps, IState> {
  const image = this.image.current;
  const imageWrapper = this.imageWrapper.current;
  - const rotation = inputRotation || this.state.rotation;
  + const rotation = inputRotation ?? this.state.rotation;
  const imageIsNotFlipped = rotation % 180 === 0;
  