How to link multiple visualization windows?

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hi,

I want to visualize two point clouds at the same time on two different visualization windows, respectively. But, I don't know how to link the two windows. For example, in matlab, I can use 'linkprop' to link multiple windows so that I can better compare the two point cloud. Does open3d has similar functions?