message: fix default roster state
diff: @@ -452,7 +452,7 @@ export default class Roster {
  });
  //@TODO || (Client.getOption('loginForm').startMinimized ? CONST.HIDDEN : CONST.SHOWN
  - let rosterState = this.options.get('visibility');
  + let rosterState = this.options.get('visibility') || CONST.SHOWN;
  this.setVisibility(rosterState);
  this.options.registerHook('visibility', (visibility) => {
  this.setVisibility(visibility);
  