[TIMOB-8611] iOS: TextArea.blur() does not hide keyboard on iPad in modal formsheet

var window = Titanium.UI.createWindow({

});

var textArea = Ti.UI.createTextArea({
	backgroundColor: 'red',
	top:10,
	height:'50'
});
window.add(textArea);

var button = Ti.UI.createButton({
	backgroundColor: 'blue',
	title:'Blur()',
	height:'50',
	top: 250
});
window.add(button);

textArea.addEventListener('blur', function(){
	Ti.API.info('blur fired');
});

textArea.addEventListener('focus', function(){
	Ti.API.info('focus fired');
});

window.open({
    modal:true,
    modalTransitionStyle: Ti.UI.iPhone.MODAL_TRANSITION_STYLE_FLIP_HORIZONTAL,
    modalStyle: Ti.UI.iPhone.MODAL_PRESENTATION_FORMSHEET
});

button.addEventListener('click', function(){
		textArea.blur();
});