Editting Particle Nodes for REFF destroys the REFT references in the particle node

[therealextreme]

Describe the bug
When a Particle Node is edited in any way. The REFT texture references in the Particle Node will be deleted when the file is saved.

To Reproduce
Steps to reproduce the behavior:

1. Open a REFF's Particle Node
2. Make any change.
3. Save
4. See error in the binary preview

Expected behavior
Previously, Particle nodes would maintain the REFT textures when saved.

Screenshots
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BEFORE

AFTER SAVE

AFTER TYPING THE TEXTURE NAME INTO THE "Texture1Name" INTO THE PARTICLE PARAMETERS AND SAVING

Desktop (please complete the following information):

• OS: [Windows 10]
• Version [Canary #9cdd787]

Crash Log

Additional context

Please attach any relevant files you were working on.