Fix the length of mfa_code field to match the current length of recovery codes

Author: charsbar

lib/pause_2017/templates/user/mfa/edit.html.ep

@@ -49,8 +49,8 @@ Verification Code is invalid.
 
 <div>
 <p>CODE: <%= text_field "pause99_mfa_code" => '',
-    size => 10,
-    maxlength => 10,
+    size => 11,
+    maxlength => 11,
 %>
 <input type="submit" name="pause99_mfa_sub" value="Submit"></p>
 </div>