Fixed some code-issues

Groups/Extensions/LedGroupExtension.cs

@@ -19,6 +19,7 @@ namespace CUE.NET.Groups.Extensions
         public static ListLedGroup ToListLedGroup(this AbstractLedGroup ledGroup)
         {
             ListLedGroup listLedGroup = ledGroup as ListLedGroup;
+            // ReSharper disable once InvertIf
             if (listLedGroup == null)
             {
                 bool wasAttached = ledGroup.Detach();

Groups/ILedGroup.cs

@@ -8,6 +8,9 @@ using CUE.NET.Effects;
 
 namespace CUE.NET.Groups
 {
+    /// <summary>
+    /// Represents a basic led-group.
+    /// </summary>
     public interface ILedGroup : IEffectTarget<ILedGroup>
     {
         /// <summary>