message: use SdkConfig brand name instead of static "Riot"
diff: @@ -1797,7 +1797,7 @@ export default React.createClass({
  },
  _setPageSubtitle: function(subtitle='') {
  - document.title = `Riot ${subtitle}`;
  + document.title = `${SdkConfig.get().brand || 'Riot'} ${subtitle}`;
  },
  updateStatusIndicator: function(state, prevState) {
  