bad X11 Forwarding performance

### 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](https://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [x] I have checked the [release documentation](https://www.open3d.org/docs/release/) and the [latest documentation](https://www.open3d.org/docs/latest/) (for `main` branch).

### Describe the issue

When using X forwarding (`ssh -XC user@host`), the performance is really bad up to the point where the window manager on the server side notified the user that the window does not respond.

### Steps to reproduce the bug

```python
1. `ssh -XC user@host`
2. run an example, e.g. `python3 ./examples/python/t_reconstruction_system/dense_slam_gui.py` or `./build/bin/examples/OnlineSLAMRGBD`
```

### Error message

The input and output is very sliggish. I see glitches in the window and "does not respond" notifications.



Eventually, this may lead to crashes of the application and I also see a termination of the ssh session.

### Expected behavior

The window should behave normal, like other X11 forwarded 3D applications in Qt etc.

### Open3D, Python and System information

```markdown
- Operating system: Ubuntu 24.04
- Python version: Python 3.12
- Open3D version: master
- System architecture: x86
- Is this a remote workstation?: yes
- How did you install Open3D?: build from source
- Compiler version (if built from source): gcc 13.3.0-6ubuntu2~24.04
```

### Additional information

The same examples behave normal when directly connected to the PC.