Keep scene tiles even if the TileMap is invisible

(cherry picked from commit 25e927e56b5efc3dba779a4104f3eec3cdeacb05)

scene/2d/tile_map.cpp

@@ -1191,7 +1191,7 @@ void TileMapLayer::_scenes_update() {
 	const Ref<TileSet> &tile_set = tile_map_node->get_tileset();
 
 	// Check if we should cleanup everything.
-	bool forced_cleanup = in_destructor || !enabled || !tile_map_node->is_inside_tree() || !tile_set.is_valid() || !tile_map_node->is_visible_in_tree();
+	bool forced_cleanup = in_destructor || !enabled || !tile_map_node->is_inside_tree() || !tile_set.is_valid();
 
 	if (forced_cleanup) {
 		// Clean everything.