Fixed document metadata null terminating removal clearing WordDocument stream

Credit https://github.com/michaelweber
EvolutionJobs#1

Author: chillNZ

Common/StructuredStorage/Common/InternalBitConverter.cs

@@ -61,7 +61,7 @@ internal string ToString(byte[] value)
             string result = enc.GetString(value);
             if (result.Contains("\0"))
             {
-                result = result.Remove(result.IndexOf("\0"));
+                result = result.TrimEnd('\0');
             }
             return result;
         }