[TIMOB-18899] iOS: Support destructive alert style

var win = Ti.UI.createWindow({
    backgroundColor: "#fff"
});

var button = Ti.UI.createButton({
    title: "Show destructive dialog"
});

var dialog = Ti.UI.createAlertDialog({
    title: "Proceed",
    message: "Do you really want to proceed?",
    destructive: 0,
    cancel: 1,
    buttonNames: ["Destructive", "Cancel", "Proceed"]
});

button.addEventListener("click", function() {
    dialog.show();
});

dialog.addEventListener("click", function(e) {
    Ti.API.info(e);
});

win.add(button);

win.open();