small fixes

Assets/Engine/Runtime/Modules/ModuleState.cs

@@ -5,6 +5,7 @@ namespace EscapeRoomEngine.Engine.Runtime.Modules
     /// <summary>
     /// An abstract module state. Example implementations are <see cref="DoorState"/> and <see cref="PuzzleState"/>.
     /// </summary>
+    [SelectionBase]
     public abstract class ModuleState : MonoBehaviour
     {
         [Tooltip("The size of this module in meters.")]

Assets/Engine/Runtime/Modules/PuzzleState.cs

@@ -32,7 +32,6 @@ namespace EscapeRoomEngine.Engine.Runtime.Modules
     /// <summary>
     /// The <see cref="ModuleState"/> of a <see cref="PuzzleModule"/>. Handles all events that can occur for a door.
     /// </summary>
-    [SelectionBase]
     public class PuzzleState : ModuleState
     {
         /// <summary>