message: fix m.federate=false warning in room settings
diff: @@ -408,11 +408,12 @@ module.exports = React.createClass({
  _yankValueFromEvent: function(stateEventType, keyName, defaultValue) {
  // E.g.("m.room.name","name") would yank the "name" content key from "m.room.name"
  - var event = this.props.room.currentState.getStateEvents(stateEventType, '');
  + const event = this.props.room.currentState.getStateEvents(stateEventType, '');
  if (!event) {
  return defaultValue;
  }
  - return event.getContent()[keyName] || defaultValue;
  + const content = event.getContent();
  + return keyName in content ? content[keyName] : defaultValue;
  },
  _onHistoryRadioToggle: function(ev) {
  @@ -704,7 +705,7 @@ module.exports = React.createClass({
  }
  var unfederatableSection;
  - if (this._yankValueFromEvent("m.room.create", "m.federate") === false) {
  + if (this._yankValueFromEvent("m.room.create", "m.federate", true) === false) {
  unfederatableSection = (
  <div className="mx_RoomSettings_powerLevel">
  { _t('This room is not accessible by remote Matrix servers') }.
  