Add an option to the admin fax menu to lock papers such that they can't be edited by cybersun pens (#28972)

* Add option to adminfax for locking papers.

* Replace dummy control with margin

Content.Server/Fax/FaxConstants.cs

@@ -29,4 +29,5 @@ public static class FaxConstants
     public const string FaxPaperStampStateData = "fax_data_stamp_state";
     public const string FaxPaperStampedByData = "fax_data_stamped_by";
     public const string FaxSyndicateData = "fax_data_i_am_syndicate";
+    public const string FaxPaperLockedData = "fax_data_locked";
 }