When set, the ui will become visible only after the root screen and TopBar components have been rendered.

Usage
Add the following to the root layout’s options, or to its child
```
animations: {
  setRoot: {
    waitForRender: true
  }
}
```

TopBar components (Title, background, buttons) can be synced as well by adding `waitForRender: true`, for example:
```
component: {
  name: 'navigation.playground.CustomTopBar',
  alignment: 'center',
  waitForRender: true,
}
```