[boskid][2.0.22] When crafting machine has fixed_quality selecting other quality gives "Unknown key: """

[Quezler]

steps to reproduce:

- set fixed_quality to the name of some quality on a crafting machine prototype
- select a product
- select a quality other than the one you've selected
- notice the "" locale thing show up

the expected behavior is that either the other quality buttons are disabled or the message by default prints that the machine is quality locked

[boskid]

For 2.0.25 i made AssemblingMachinePrototype to ignore fixed_quality when fixed_recipe is not specified.