* <p>Actually, popup is never blocked, because it is initiated by user.
* But in case it is not truth, we show alert to user that instructs how to
* enable popups.
*/
public static Window createOrOpenPopup(AppContext appContext) {
Window popup =
Browser.getWindow().open("", BootstrapSession.getBootstrapSession().getActiveClientId());
if (popup == null) {
if (!doNotShowPopupBlockedInstruction) {
doNotShowPopupBlockedInstruction = true;
PopupBlockedInstructionalPopup.create(appContext.getResources()).show();