### 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
drag_type = DRAG_TYPE_MAY_POPUP_MENU;
				drag_start_mouse_pos = alternative_tiles_control->get_local_mouse_position();
			} else {
				if (drag_type == DRAG_TYPE_MAY_POPUP_MENU) {
					
					Vector3 tile = tile_atlas_view->get_alternative_tile_at_pos(mouse_local_pos);
					selection.clear();
					TileSelection selected = { Vector2i(tile.x, tile.y), int(tile.z) };
					if (selected.tile != TileSetSource::INVALID_ATLAS_COORDS) {
						selection.insert(selected);
					}
					_update_tile_inspector();
					_update_tile_id_label();
					if (selection.size() == 1) {
						selected = selection.front()->get();
						menu_option_coords = selected.tile;
						menu_option_alternative = selected.alternative;
						alternative_tile_popup_menu->popup(Rect2i(get_screen_transform().xform(get_local_mouse_position()), Size2i()));
					}
				}
				drag_type = DRAG_TYPE_NONE;
			}
		}
		tile_atlas_control->queue_redraw();
		tile_atlas_control_unscaled->queue_redraw();
		alternative_tiles_control->queue_redraw();
		alternative_tiles_control_unscaled->queue_redraw();
	}
}
void TileSetAtlasSourceEditor::_tile_alternatives_control_mouse_exited() {