Display User Geometry Toggle

[Lukasfuh]

Describe the bug
The toggle to see users geometry does not work correctly. When I toggle it, sometimes the geometry of the user is still displayed. And once it disappears and i toggle it back to display, it wont show up anymore until i release

To Reproduce
Steps to reproduce the behavior:

1. Make some geometry
2. Toggle the other user off
3. Make some geometry with the other user
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

Version Info (please complete the following information):

• Rhino Version [x.x.x]
• Crash Version [x.x.x]

Additional context
Add any other context about the problem here.