Fix for issue #27.

Author: svenrog

src/Geta.Optimizely.GenericLinks/PropertyLinkData.cs

@@ -135,15 +135,15 @@ public override object? Value
 
                 return _linkItem;
             }
-            
+
             set
             {
                 SetPropertyValue(value, delegate
                 {
                     var linkData = value as TLinkData;
                     if (linkData is not null || value is null)
                     {
-                        _linkItem = linkData;
+                        Link = linkData;
                     }
                     else
                     {
@@ -209,7 +209,7 @@ public override void MakeReadOnly()
             if (!IsReadOnly)
                 _linkItem?.SetModified(false);
 
-            base.MakeReadOnly();            
+            base.MakeReadOnly();
         }
 
         public override PropertyData Copy()

src/Geta.Optimizely.GenericLinks/PropertyLinkDataCollection.cs

@@ -134,17 +134,17 @@ public override object? Value
                 {
                     LoadData(base.LongString);
                 }
-                
+
                 return _linkItemCollection;
-            } 
+            }
             set
             {
                 SetPropertyValue(value, delegate
                 {
                     var collection = value as LinkDataCollection<TLinkData>;
                     if (collection is not null || value is null)
                     {
-                        _linkItemCollection = collection;
+                        Links = collection;
                     }
                     else
                     {