### 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
Vector2 mouse_local_pos = tile_atlas_control->get_local_mouse_position();
			TileSelection selected = { tile_atlas_view->get_atlas_tile_coords_at_pos(mouse_local_pos), 0 };
			if (selected.tile != TileSetSource::INVALID_ATLAS_COORDS) {
				selected.tile = tile_set_atlas_source->get_tile_at_coords(selected.tile);
			}
			
			if (selection.size() <= 1) {
				if (selected.tile != TileSetSource::INVALID_ATLAS_COORDS) {
					undo_redo->create_action(TTR("Select tiles"));
					undo_redo->add_undo_method(this, "_set_selection_from_array", _get_selection_as_array());
					selection.clear();
					selection.insert(selected);
					undo_redo->add_do_method(this, "_set_selection_from_array", _get_selection_as_array());
					undo_redo->commit_action(false);
					_update_tile_inspector();
					_update_tile_id_label();
					_update_current_tile_data_editor();
				}
			}
			
			if (selected.tile != TileSetSource::INVALID_ATLAS_COORDS && selection.has(selected)) {
				
				menu_option_coords = selected.tile;
				menu_option_alternative = 0;
				base_tile_popup_menu->popup(Rect2i(get_screen_transform().xform(get_local_mouse_position()), Size2i()));
			} else if (hovered_base_tile_coords != TileSetSource::INVALID_ATLAS_COORDS) {
				
				menu_option_coords = hovered_base_tile_coords;
				menu_option_alternative = TileSetSource::INVALID_TILE_ALTERNATIVE;
				empty_base_tile_popup_menu->popup(Rect2i(get_screen_transform().xform(get_local_mouse_position()), Size2i()));