Hand Settings Sometimes stick in editor after being changed

[ddugganCRA]

Describe the bug
Sometimes, after setting up the leap motion Hand SDK and then changing the setting manually back to No Hands, the settings will revert to Leap Motion at runtime.

We've also seen this happen occasionally with other SDK settings

To Reproduce
Steps to reproduce the behavior:

1. Setup up a scene with leap motion hands
2. Press run
3. Change settings back to No Hands
4. Press run again

Expected behavior
When you change a setting, it ought to stay changed.

[VR-Nic]

I believe this may be related to prefabs. I have had similar issues and the quickest way to fix it was to unpack the prefab. Related: https://issuetracker.unity3d.com/issues/prefabs-references-are-lost-when-modifying-prefab