8479 - Fix grey screen on Other/Unclassified toggle

[Samulus]

Fixes #8479 , tested on Linux / Firefox / Proprietary NVIDIA driver. Also tested on Windows with the proprietary Nvidia driver

[cesium-concierge]

Thanks for the pull request @Samulus!

• ✔️ Signed CLA found.
• ❔ CHANGES.md was not updated.
  • If this change updates the public API in any way, please add a bullet point to CHANGES.md.
• ❔ Unit tests were not updated.
  • Make sure you've updated tests to reflect your changes, added tests for any new code, and ran the code coverage tool.

Reviewers, don't forget to make sure that:

• Cesium Viewer works.
• Works in 2D/CV.
• Works (or fails gracefully) in IE11.

[lilleyse]

Confirmed this works on Linux/Chrome/Nvidia and Mac 2015/Chrome/AMD.

[lilleyse]

@Samulus just add an entry to CHANGES.md and I'll merge

[Samulus]

@lilleyse Added CHANGES.md

[lilleyse]

Thanks @Samulus!

Hopefully this same fix can apply to #7557 and any other systems that hide points in this way.

[Samulus]

Thanks @Samulus!

Hopefully this same fix can apply to #7557 and any other systems that hide points in this way.

Doesn't apply from what I can see, I'm able to reproduce that bug with this commit on Nvidia / Linux still

[lilleyse]

@Samulus ah too bad..