[TIMOB-18317] iOS: Dialog arrow starts in center instead of at edge of view

var win = Ti.UI.createWindow({
  backgroundColor: 'white'
});

var button = Ti.UI.createButton({
  title: 'Open Popover!',
  backgroundColor: 'red'
});
button.addEventListener('click', function(e) {
  popover.show({
    view: button
  });
});
win.add(button);

var rightButton = Ti.UI.createButton({
  title: 'Robin'
});
rightButton.addEventListener('click', function(e) {
  alert("But green's the color of spring.");
});

var contentWindow = Ti.UI.createWindow({
  backgroundColor: 'green',
  rightNavButton: rightButton,
  title: 'Kermit',
  width: 250,
  height: 100
});
contentWindow.add(Ti.UI.createLabel({
  text: "It's not easy being green."
}));

var popover = Ti.UI.iPad.createPopover({
  width: 250,
  height: 100,
  contentView: Ti.UI.iOS.createNavigationWindow({
    window: contentWindow
  })
});

win.open();