TextureFilter "",1+8 ; restore default
Yeah, that's just reimplementing the old texture filter. My fault, I should have explained better. What I meant was to implement a new, different texture filter. Something like "_std" and rename all your textures to include "_std" if you want typical filters.
I'm pretty sure that implementing a "" filter, or basically a wildcard filter is applying mipmapping again, regardless of the additional, later filter you add turning it off again.