message: Use DialogButtons in AddressSelector
  Use DialogButtons to eliminate duplicate button code.
diff: @@ -507,6 +507,7 @@ module.exports = React.createClass({
  render: function() {
  const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
  + const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
  const AddressSelector = sdk.getComponent("elements.AddressSelector");
  this.scrollElement = null;
  @@ -590,11 +591,9 @@ module.exports = React.createClass({
  { addressSelector }
  { this.props.extraNode }
  </div>
  - <div className="mx_Dialog_buttons">
  - <button className="mx_Dialog_primary" onClick={this.onButtonClick}>
  - { this.props.button }
  - </button>
  - </div>
  + <DialogButtons primaryButton={this.props.button}
  + onPrimaryButtonClick={this.onButtonClick}
  + onCancel={this.onCancel} />
  </BaseDialog>
  );
  },
  