message: Fix RoomSettings save
  Looks like saving RoomSettings had been broken since `isFulfilled`
  cannot be used as a static function.
diff: @@ -298,7 +298,7 @@ module.exports = React.createClass({
  // color scheme
  var p;
  p = this.saveColor();
  - if (!Promise.isFulfilled(p)) {
  + if (!p.isFulfilled()) {
  promises.push(p);
  }
  @@ -310,7 +310,7 @@ module.exports = React.createClass({
  // encryption
  p = this.saveEnableEncryption();
  - if (!Promise.isFulfilled(p)) {
  + if (!p.isFulfilled()) {
  promises.push(p);
  }
  