[UMG] Checkbox forcing tick

Hey, since 4.7 I think, checkboxes always have a tick style.
No matter if I create a new one, or copy an old one. Old checkboxes stay the same.

What I mean is, if I change the checked styles’s tint to yellow, I always had a yellow, flat, clean checkbox.
But now it always has a tick in it. Can I disable this behaviour, or do I have to set a clean white image on every box and then tint it?