### Godot version

v4.2.dev3.official [013e8e3af]

### System information

Windows 11, Core i5-12400F, RX 6600

### Issue description

TileSet->Setup->Separation maybe should have "px" like rest?
![Screenshot 2023-08-21 162202](https://github.com/godotengine/godot/assets/962340/3c6b9a97-7520-4610-8153-7882cc9c303f)
I know this is pixels from testing it.

TileSet->Select is this Animation Separation "px" too? idk
![Screenshot 2023-08-21 162131](https://github.com/godotengine/godot/assets/962340/fcb580e3-9ff7-41d8-92d3-e585841d3803)
I tried setting up animation separation and got a not enough room error, so maybe not "px". idk


Thanks.


### Steps to reproduce

- open TileSet->Setup->Separation, note some have "px" and one doesn't
- open TileSet->Select, is this separation "px" too?


### Minimal reproduction project

n/a
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	switch (p_option) {
		case TILE_DELETE: {
			List<PropertyInfo> list;
			tile_set_atlas_source->get_property_list(&list);
			HashMap<Vector2i, List<const PropertyInfo *>> per_tile = _group_properties_per_tiles(list, tile_set_atlas_source);
			undo_redo->create_action(TTR("Remove tile"));
			
			RBSet<Vector2i> removed;
			for (const TileSelection &E : selection) {
				TileSelection selected = E;
				if (selected.alternative == 0) {
					
					undo_redo->add_do_method(tile_set_atlas_source, "remove_tile", selected.tile);
					undo_redo->add_undo_method(tile_set_atlas_source, "create_tile", selected.tile);
					removed.insert(selected.tile);
					if (per_tile.has(selected.tile)) {
						for (List<const PropertyInfo *>::Element *E_property = per_tile[selected.tile].front(); E_property; E_property = E_property->next()) {
							String property = E_property->get()->name;
							Variant value = tile_set_atlas_source->get(property);
							if (value.get_type() != Variant::NIL) {
								undo_redo->add_undo_method(tile_set_atlas_source, "set", E_property->get()->name, value);
							}
						}
					}
				}
			}
			
			for (const TileSelection &E : selection) {
				TileSelection selected = E;