Texture conflict when using textures with the same name but from different locations

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ArmorLab 0.1-7bc8676, Windows

Issue description: When I import a new texture with the same name as another one (but with a different filepath) ArmorLab uses the other texture instead of the one I just imported.

Steps to reproduce:

• Import a texture.
• Import another texture with the exact same name but from a different location.