* @param user the logged in user. The popup does not show it but makes sure it is
* in the participant set returned
*/
public UniversalPopup showInPopup(ParticipantId user, Set<ParticipantId> participants,
ProfileManager profiles) {
PopupChrome chrome = PopupChromeFactory.createPopupChrome();
UniversalPopup popup = PopupFactory.createPopup(
null, new CenterPopupPositioner(), chrome, true);
TitleBar titleBar = popup.getTitleBar();
titleBar.setTitleText("Select participants");