Sprite button quality - Ability to display any icon as a "quality"

[Gergely]

What

The sprite button quality field should accept any SpritePath the same way the sprite field does.

Why?

This would enable displaying the icon as a quality in a sprite button. There are possibly other uses such as displaying other virtual signals or even items/fluids in the corner.

[Shemp]

You could also add another Sprite as a child element of the original SpriteButton. You can use a style or fix it inside a table to make it draw in the corner.