FIX: GridContainer children visibility check for min size evaluation

scene/gui/grid_container.cpp

@@ -210,7 +210,7 @@ Size2 GridContainer::get_minimum_size() const {
 	for (int i = 0; i < get_child_count(); i++) {
 
 		Control *c = Object::cast_to<Control>(get_child(i));
-		if (!c || !c->is_visible_in_tree())
+		if (!c || !c->is_visible())
 			continue;
 		int row = valid_controls_index / columns;
 		int col = valid_controls_index % columns;