RTE media folder config is stored as a GUID in V14 (#16138)

Author: kjac

src/Umbraco.Core/PropertyEditors/RichTextConfiguration.cs

@@ -9,7 +9,7 @@ public class RichTextConfiguration : IIgnoreUserStartNodesConfig
     public RichTextBlockConfiguration[]? Blocks { get; set; } = null!;
 
     [ConfigurationField("mediaParentId")]
-    public GuidUdi? MediaParentId { get; set; }
+    public Guid? MediaParentId { get; set; }
 
     [ConfigurationField(Constants.DataTypes.ReservedPreValueKeys.IgnoreUserStartNodes)]
     public bool IgnoreUserStartNodes { get; set; }

src/Umbraco.Infrastructure/PropertyEditors/RichTextPropertyEditor.cs

@@ -214,8 +214,7 @@ public override IEnumerable<ITag> GetTags(object? value, object? dataTypeConfigu
                           Constants.Security.SuperUserKey;
 
             var config = editorValue.DataTypeConfiguration as RichTextConfiguration;
-            GuidUdi? mediaParent = config?.MediaParentId;
-            Guid mediaParentId = mediaParent == null ? Guid.Empty : mediaParent.Guid;
+            Guid mediaParentId = config?.MediaParentId ?? Guid.Empty;
 
             if (string.IsNullOrWhiteSpace(richTextEditorValue.Markup))
             {