SLSC Switch custom device does not import valid capabilities files

[smithed180]

Describe the bug
Per the title, I can press Load from JSON, give it a json file the rest of the SLSC toolchain supports, and it fails. The user is required to manually minify it (I used the slsc "example" code, "Restore NVMEM from File.vi").

To Reproduce
Steps to reproduce the behavior:

1. Find any unminified capabilities file (ie with comments)
2. Click on Load from JSON
3. Error occurs (-250876, not valid json content)

Expected behavior
SLSC as far as I know has no canonical minification function, I use the "example" one, but that should be included in this CD.

Desktop (please complete the following information):

• OS: windows
• Version 20.4.0

Additional context
After minification, loading the file still generates "Unknown" error -1074114549. Not sure if this is related.