Fix code warnings.

Source/Editor/CustomEditors/Editors/ControlReferenceEditor.cs

@@ -18,7 +18,7 @@ namespace FlaxEditor.CustomEditors.Editors;
 public class UIControlRefPickerControl : Control
 {
     private Type _controlType;
-    public UIControl _value;
+    private UIControl _value;
     private ActorTreeNode _linkedTreeNode;
     private string _valueName;
     private bool _supportsPickDropDown;

Source/Engine/UI/ControlReference.cs

@@ -86,6 +86,17 @@ public struct ControlReference<T> : IControlReference where T : Control
         _uiControl = null;
     }
     
+    /// <summary>
+    /// The implicit operator for the Control.
+    /// </summary>
+    /// <param name="reference">The ControlReference</param>
+    /// <returns>The Control.</returns>
     public static implicit operator T(ControlReference<T> reference) => reference.Control;
+    
+    /// <summary>
+    /// The implicit operator for the UIControl
+    /// </summary>
+    /// <param name="reference">The ControlReference</param>
+    /// <returns>The UIControl.</returns>
     public static implicit operator UIControl(ControlReference<T> reference) => reference.UIControl;
 }