How to "align geometry with direction of x-axis, y-axis or z-axis" on SceneWidget (C++) ?

### 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, Open3D Teams,

I'm wondering that Is there any way to align geometry with the direction of the x-axis, y-axis or z-axis on SceneWidget. I had tried with python sourcecode "interactive_visualization.py", it can align with the y-axis but it uses draw_geometries_with_editing instead.
For example:

1. "interactive_visualization.py" example can align with the y-axis and the user just can rotate follow clockwise instead of translating and rotating in any direction


2. I want to align the SceneWidget below to x, y or z axis and the user just can rotate follow clockwise. Is there any way to overcome this problem?