message: Added back navigation check
diff: @@ -25,7 +25,7 @@ export default ({direction, color, stateNavigator}) => {
  <div
  style={styles.text}
  onClick={() => {
  - if (url === stateNavigator.stateContext.url)
  + if (url === stateNavigator.stateContext.url && stateNavigator.canNavigateBack(1))
  stateNavigator.navigateBack(1);
  }}>
  Back
  