Delete multiselection of materials/textures -> undo -> redo -> material browser shows the deleted content

• Create multiple materials and textures
• Multiselect them in navigator (need to enable showing non-visible components in navigator to see material library)
• Delete the selection
• Undo the deletion
• Redo the deletion

--> Material browser, material editor, and texture editor all still show deleted content until otherwise updated.

Somehow multiselect deletion by redo doesn't trigger normal nodes removed notifications. Navigator updater correctly in this case, though, so look there for clues what notification needs to be handled.