I often edit sprite collections and sometimes remove animation frames there. The problem is that I can't edit any SpriteAnimation when it contains a frame that doesn't exist anymore. I can't even delete the animation because everytime when I select it there is a NullRef error. This happens in 1.92 and 2.0 beta. Is there a way to avoid that? It would be nice if it would work the same like when files don't exist anymore in SpriteCollections (with "(missing)" at the end of the name)