GUI elements now respect render order + some minor distance comparison optimization

Subsurface/Source/GameSession/GameModes/Tutorials/TutorialMode.cs

@@ -27,6 +27,11 @@ namespace Barotrauma
 
         }
 
+        public override void AddToGUIUpdateList()
+        {
+            tutorialType.AddToGUIUpdateList();
+        }
+
         public override void Update(float deltaTime)
         {
             base.Update(deltaTime);