Possible to create a group with the background layer, which makes it disappear

Found a bug where it’s possible to move the background layer into a group, which causes it to disappear.

If you try to move the background into a pre-existing group a popup message appears saying the background cannot be moved, so I assume this should not possible.

Steps to reproduce:

  1. Have the background layer selected.
  2. Right-click on it and create a group.

P.S. I love Aseprite :heart: