### 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
tile_set_changed_needs_update = false;
		tile_atlas_control->queue_redraw();
		tile_atlas_control_unscaled->queue_redraw();
		alternative_tiles_control->queue_redraw();
		alternative_tiles_control_unscaled->queue_redraw();
		tile_atlas_view->queue_redraw();
		return;
	} else {
		
		Ref<InputEventMouseMotion> mm = p_event;
		if (mm.is_valid()) {
			Vector2i start_base_tiles_coords = tile_atlas_view->get_atlas_tile_coords_at_pos(drag_start_mouse_pos, true);
			Vector2i last_base_tiles_coords = tile_atlas_view->get_atlas_tile_coords_at_pos(drag_last_mouse_pos, true);
			Vector2i new_base_tiles_coords = tile_atlas_view->get_atlas_tile_coords_at_pos(tile_atlas_control->get_local_mouse_position());
			Vector2i grid_size = tile_set_atlas_source->get_atlas_grid_size();
			if (drag_type == DRAG_TYPE_CREATE_BIG_TILE) {
				
				new_base_tiles_coords = new_base_tiles_coords.max(Vector2i(0, 0)).min(grid_size - Vector2i(1, 1));
				Rect2i new_rect = Rect2i(start_base_tiles_coords, new_base_tiles_coords - start_base_tiles_coords).abs();
				new_rect.size += Vector2i(1, 1);
				
				if (tile_set_atlas_source->has_room_for_tile(new_rect.position, new_rect.size, tile_set_atlas_source->get_tile_animation_columns(drag_current_tile), tile_set_atlas_source->get_tile_animation_separation(drag_current_tile), tile_set_atlas_source->get_tile_animation_frames_count(drag_current_tile), drag_current_tile)) {
					
					tile_set_atlas_source->move_tile_in_atlas(drag_current_tile, new_rect.position, new_rect.size);
					drag_current_tile = new_rect.position;
				}
			} else if (drag_type == DRAG_TYPE_CREATE_TILES) {
				
				last_base_tiles_coords = last_base_tiles_coords.max(Vector2i(0, 0)).min(grid_size - Vector2i(1, 1));