Issue description:
If I want to change the priority in refined storage the client crashes

What happens:
When I click on Priority the client crashes

Steps to reproduce:

1. Connect a external Storage / Disk Drive
2. Open the GUI and click on priority
3. Client Crash

Version

• Minecraft: 1.15.2
• Forge: 31.1.46
• Refined Storage: 1.8.1
• QuickStack: 3.0.3c

Crashlog and Bug Report (refined storage)

• https://pastebin.com/S4cujUk6
• refinedmods/refinedstorage#2486

yay, another mod that doesn't register it's containers

Rs registers its containers perfectly fine.

No it's not, otherwise it wouldn't be crashing.

The crash above is only possible if a container has both a null containertype and it doesn't override getType