Support relative asset paths in %RequiredTexture

[KathTheDragon]

I have a module with a custom noise texture that I want to share, but %RequiredTexture does not support using relative paths to identify assets in the main Asset folder. For instance, I have the folder structure

/Assets
    /Kamare
        /Shaders
            /Modules
                module.orlsource
            /Textures
                noise.png

and I would like to use the relative path ../Textures/noise.png to identify my noise texture from the module source.