Deleting texture and undoing the deletion sometimes changes material selection in material browser

• Add multiple textures (important to do this before adding materials)
• Add multiple materials
• Delete a texture
• Undo texture deletion

-> Material selection changes

The reason is presumably that internal structure of model changes at undo of deletion, causing confusing notifications. There probably needs to be some delay before choosing to change the selection in case of node removal just in case the node comes back immediately.