Make the empty_list_actions HBoxContainer into a FlowContainer.

editor/project_manager.cpp

@@ -1423,8 +1423,8 @@ ProjectManager::ProjectManager() {
 				empty_list_message->set_text(vformat("[center][b]%s[/b] %s[/center]", line1, line2));
 				empty_list_placeholder->add_child(empty_list_message);
 
-				HBoxContainer *empty_list_actions = memnew(HBoxContainer);
-				empty_list_actions->set_alignment(BoxContainer::ALIGNMENT_CENTER);
+				FlowContainer *empty_list_actions = memnew(FlowContainer);
+				empty_list_actions->set_alignment(FlowContainer::ALIGNMENT_CENTER);
 				empty_list_placeholder->add_child(empty_list_actions);
 
 				empty_list_create_project = memnew(Button);