DNA scrambler examine fixes (#34920)

* Remove custom character description after using DNA scrambler

* Mark grammar as dirty when updating identity

* Update Content.Server/Implants/SubdermalImplantSystem.cs

---------

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

Content.Server/IdentityManagement/IdentitySystem.cs

@@ -103,6 +103,8 @@ public sealed class IdentitySystem : SharedIdentitySystem
             // If presumed name is null and we're using that, we set proper noun to be false ("the old woman")
             if (name != representation.TrueName && representation.PresumedName == null)
                 identityGrammar.ProperNoun = false;
+
+            Dirty(ident, identityGrammar);
         }
 
         if (name == Name(ident))