Fix PlayerStatusHUD addition being pushed to GameObjectManager un…

…do stack

`PlayerStatusHUD` is no longer added in editor levels. This fixes a bug where it would be pushed to the undo stack and opening a level in the editor without doing anything would still have it marked as having unsaved changes.

`PlayerStatusHUD` now also overrides `track_state` to indicate that it shouldn't be tracked, just in case.

src/supertux/level.cpp

@@ -84,7 +84,11 @@ Level::initialize(const Statistics::Preferences& stat_preferences)
     &GameSession::current()->get_savegame() : nullptr);
   PlayerStatus& player_status = savegame ? savegame->get_player_status() : s_dummy_player_status;
 
-  if (Editor::current() || (savegame && !savegame->is_title_screen() && !m_suppress_pause_menu))
+  // Condition 1: If there is a savegame, it shouldn't be from the title screen. (Don't load HUD on title screen)
+  // Condition 2: Pause menu shouldn't be suppressed.
+  // Condition 3: The level shouldn't be loaded in the editor.
+  if ((!savegame || !savegame->is_title_screen()) &&
+      !m_suppress_pause_menu && !Editor::is_active())
   {
     for (auto& sector : m_sectors)
       sector->add<PlayerStatusHUD>(player_status);

src/supertux/player_status_hud.hpp

@@ -44,6 +44,7 @@ class PlayerStatusHUD : public GameObject
 
   virtual bool is_saveable() const override { return false; }
   virtual bool is_singleton() const override { return true; }
+  virtual bool track_state() const override { return false; }
 
   void reset();