CoronaBitmap - UI things

[romullus]

Why channel maps in CoronaBitmap is named Geometry UVW channel? I think it's confusing. Also there's no #0 channel map in 3ds max, yet one can select it in CoronaBitmap.

There's no upper limit in filtering blur spinner. This might be confusing too.

[racoonart]

Channel 0 is the vertex color channel. You can also use that in the default bitmap map in max, you just have to switch the mapping type to use vertex color channel. So it's simpler here (but maybe misleading for users who don't know that)

[romullus]

My bad, i didn't know that. And agree on that it will confuse a lot folks.

[Ondra]

renamed