message: replace old storage key style (fix
diff: @@ -1123,9 +1123,9 @@ jsxc.xmpp = {
  type: 'subscribe'
  }));
  - jsxc.storage.removeUserItem('add_' + bid);
  + jsxc.storage.removeUserItem('add', bid);
  } else {
  - jsxc.storage.setUserItem('add_' + bid, {
  + jsxc.storage.setUserItem('add', bid, {
  username: username,
  alias: alias || null
  });
  