Issue with ZoomedScene - activate_zooming?

As the title indicates there's a small issue with zoomed_scene.py

The current code yields an expanding blank area:
```
if animate:
self.play(self.get_zoom_in_animation())
self.play(self.get_zoomed_display_pop_out_animation())
self.add_foreground_mobjects(
self.zoomed_camera.frame,
self.zoomed_display,
)
```

Moving get_zoomed_display_pop_out_animation down and below add_foreground_mobjects has fixed the issue for me.
```
if animate:
self.play(self.get_zoom_in_animation())
self.add_foreground_mobjects(
self.zoomed_camera.frame,
self.zoomed_display,
)
if animate:
self.play(self.get_zoomed_display_pop_out_animation())
```