Setting a box’s background removes its chrome

[bentsai]

Steps to repro:

1. Create a box.
2. Set the background to an image.
3. Observe: The box title and border are gone. You cannot click on the name to bring up the edit dialog. You can paint-select it and perform those operations there. And you can click and drag to move it where the name is supposed to be.

[pirijan]

fix released