message: Cleared init before clone
  If configure called then history manager created afresh so needs clearing again
diff: @@ -7,7 +7,6 @@ class NavigationHandler extends React.Component<{ stateNavigator: StateNavigator
  super(props);
  var { stateNavigator } = props;
  stateNavigator.getNavigateContinuation = this.getNavigateContinuation.bind(this);
  - stateNavigator.historyManager.init = () => {};
  this.state = { stateNavigator };
  }
  @@ -16,6 +15,7 @@ class NavigationHandler extends React.Component<{ stateNavigator: StateNavigator
  this.setState(() => {
  var { stateNavigator } = this.props;
  if (oldUrl === stateNavigator.stateContext.url) {
  + stateNavigator.historyManager.init = () => {};
  var clonedNavigator = stateNavigator.clone(stateNavigator.historyManager);
  clonedNavigator.stateContext = stateNavigator.getStateContext(state, data, url, asyncData, history);
  clonedNavigator.configure = stateNavigator.configure.bind(stateNavigator);
  