[v4] form-control: Remove background-image: none;

Created by: mariusa

form-control has background-image: none;

Why is that?

On some sites there are customizations on select, which set webkit-appearance to none and add a background-image with an arrow. Applying bootstrap removes that image, but also doesn't reset webkit-appearance (remains none), so select controls don't have a dropdown icon at all.

Would you please consider removing background-image: none; ?