Ensure explicit getters and setters

PortableExecutable/MenuHeaderExtended.cs

@@ -13,18 +13,18 @@ namespace SabreTools.Models.PortableExecutable
         /// <summary>
         /// The template version number. This member must be 1 for extended menu templates.
         /// </summary>
-        public ushort Version;
+        public ushort Version { get; set; }
 
         /// <summary>
         /// The offset to the first MENUEX_TEMPLATE_ITEM structure, relative to the end of
         /// this structure member. If the first item definition immediately follows the
         /// dwHelpId member, this member should be 4.
         /// </summary>
-        public ushort Offset;
+        public ushort Offset { get; set; }
 
         /// <summary>
         /// The help identifier of menu bar.
         /// </summary>
-        public uint HelpID;
+        public uint HelpID { get; set; }
     }
 }