### 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
atlas_source_proxy_object->edit(tile_set, tile_set_atlas_source, tile_set_atlas_source_id);
}
void TileSetAtlasSourceEditor::_update_fix_selected_and_hovered_tiles() {
	
	for (RBSet<TileSelection>::Element *E = selection.front(); E;) {
		RBSet<TileSelection>::Element *N = E->next();
		TileSelection selected = E->get();
		if (!tile_set_atlas_source->has_tile(selected.tile) || !tile_set_atlas_source->has_alternative_tile(selected.tile, selected.alternative)) {
			selection.erase(E);
		}
		E = N;
	}
	
	if (!tile_set_atlas_source->has_tile(hovered_base_tile_coords)) {
		hovered_base_tile_coords = TileSetSource::INVALID_ATLAS_COORDS;
	}
	Vector2i coords = Vector2i(hovered_alternative_tile_coords.x, hovered_alternative_tile_coords.y);
	int alternative = hovered_alternative_tile_coords.z;
	if (!tile_set_atlas_source->has_tile(coords) || !tile_set_atlas_source->has_alternative_tile(coords, alternative)) {
		hovered_alternative_tile_coords = Vector3i(TileSetSource::INVALID_ATLAS_COORDS.x, TileSetSource::INVALID_ATLAS_COORDS.y, TileSetSource::INVALID_TILE_ALTERNATIVE);
	}
}
void TileSetAtlasSourceEditor::_update_atlas_source_inspector() {
	
	bool inspector_visible = tools_button_group->get_pressed_button() == tool_setup_atlas_source_button;
	atlas_source_inspector->set_visible(inspector_visible);
	atlas_source_inspector->set_read_only(read_only);
}
void TileSetAtlasSourceEditor::_update_tile_inspector() {