Texture conflicts between mods

[CuriousMike56]

This issue ticket provides additional details to the Texture with the same name interferes between mods (even if they are in separate ZIPs) problem reported in #3122.

To assist with testing, I've created two test mods:
MaterialConflictTestRed.zip
MaterialConflictTestBlue.zip

They are simple cubes, with the center being submeshed (texcoords), left a prop, and right a flexbody. Also features a custom N flare material with the same color.
The submeshed cube material name is CM_TestCubeSubmesh, defined in a .material file. The flare material (CM_TestCubeFlare) is also defined in this file.
Prop and flexbody cube material name is CM_TestCube, defined in the managedmaterials section.
Both versions share the same material and texture names.

In 2022.12, both versions can be spawned without conflict:

Now with the introduction of the tuning menu, spawning either version will conflict with the other:

Submesh, prop, and flexbody cube textures all conflict. Only the flare uses the correct texture.

[ohlidalp]

Thank you for the test mods, I feel way more confident than if I tried to reproduce all by myself.

The offending commit is 74ed108.

[ohlidalp]

I accidentally pushed the fix directly without making a PR. But it's pretty straightforward and only tackles the one thing, so I'm confident it doesn't break anything.