[TIMOB-14490] iOS: iPad popover view memory leak when opening/closing popover

var window = Ti.UI.createWindow();
var openButton = Titanium.UI.createButton({title:'Open'});

window.add(openButton);

openButton.addEventListener('click', function (e) {

    var closeButton = Titanium.UI.createButton({title:'Cancel'});
    var popover = Ti.UI.iPad.createPopover({ height:300, width:300,
        title:'Add a Walk In', leftNavButton:closeButton});
    var tabbedBar = Titanium.UI.iOS.createTabbedBar({
        labels:['One', 'Two', 'Three'],
        backgroundColor:'#336699',
        top:50,
        style:Titanium.UI.iPhone.SystemButtonStyle.BAR,
        height:25,
        width:200
    });
    popover.add(tabbedBar);

    popover.show({
        view:openButton, animated:true
    });

    closeButton.addEventListener('click', function (e) {
        tabbedBar.hide();
        popover.remove(tabbedBar);
        tabbedBar = null;
        popover.hide();
        popover = null;
    });

});

window.open();