message: Allow saving room topic or name only
  This changes the room profile settings to support saving _only_ the room topic or
  name in case you have limited access to set one but not the other.
  Fixes
diff: @@ -81,7 +81,11 @@ export default class RoomProfileSettings extends React.Component {
  if (!this.state.enableProfileSave) return;
  this._removeAvatar();
  - this.setState({enableProfileSave: false, displayName: this.state.originalDisplayName});
  + this.setState({
  + enableProfileSave: false,
  + displayName: this.state.originalDisplayName,
  + topic: this.state.originalTopic,
  + });
  };
  _saveProfile = async (e) => {
  @@ -164,7 +168,7 @@ export default class RoomProfileSettings extends React.Component {
  const AvatarSetting = sdk.getComponent('settings.AvatarSetting');
  let profileSettingsButtons;
  - if (this.state.canSetTopic && this.state.canSetName) {
  + if (this.state.canSetTopic || this.state.canSetName) {
  profileSettingsButtons = (
  <div className="mx_ProfileSettings_buttons">
  <AccessibleButton
  