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.")]