message: Passed old crumbs for replacee
  Could replace the current screen at the same time as replacing crumbs in the stack. Use the old crumbs to ensure matches they match crumbs when screen was pushed
diff: @@ -66,7 +66,7 @@ class NavigationStack extends React.Component<NavigationStackProps, NavigationSt
  }
  if (crumbs.length == oldCrumbs.length) {
  var enterAnim = unmountStyle(true, state, data, crumbs);
  - var exitAnim = unmountStyle(false, oldState, oldData, crumbs, state, data);
  + var exitAnim = unmountStyle(false, oldState, oldData, oldCrumbs, state, data);
  }
  return {enterAnim, exitAnim, sharedElements, oldSharedElements};
  }
  