Reset To Defaults in Editor Preferences Graph Editor does not work consistently

The Reset to Defaults button in Editor Preferences does not reset all the properties to their default values.

Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4543149), 4.22 (CL - 4546476)

1. Open a Blank Blueprint project
2. Open Editor Preferences
3. Make changes to a few properties 
4. Click the Reset to Defaults button at the top right

Expected: The properties would return to the values that were set to default.

Result: Not all properties reset to their default values