Make `TileMapEditorTerrainsPlugin::edit` logic analogous to `TileMapEditorTilesPlugin::edit`, in that the selection is only cleared when switching to another tilemap. Closes #70033.
Make `TileMapEditorTerrainsPlugin::edit` logic analogous to `TileMapEditorTilesPlugin::edit`, in that the selection is only cleared when switching to another tilemap. Closes #70033.