[AC-2455] iOS: Date/Time Picker will not show when the picker is attached to a window that is part of a tab group

            textField.addEventListener('click', function(e) {
              var pickerLabel = Ti.UI.createLabel({
                text : e.source.columnName
              });
              var cancel = Titanium.UI.createButton({
                title : 'Cancel',
                style : Titanium.UI.iPhone.SystemButtonStyle.BORDERED
              });
              var done1 = Titanium.UI.createButton({
                title : 'Done',
                style : Titanium.UI.iPhone.SystemButtonStyle.DONE
              });
              var spacer = Titanium.UI.createButton({
                systemButton : Titanium.UI.iPhone.SystemButton.FLEXIBLE_SPACE
              });
              var toolbar1 = Titanium.UI.iOS.createToolbar({
                bottom : 210,
                items : [cancel, spacer, pickerLabel, spacer, done1]
              });
              var timeInField = e.source.value; 
              var arrayOfTime = e.source.value.split(':',3);
              var tvalue = new Date();
              tvalue.setHours(arrayOfTime[0]);
              tvalue.setMinutes(arrayOfTime[1]);
              tvalue.setSeconds(arrayOfTime[2]);
              var picker = Ti.UI.createPicker({
                type : Ti.UI.PICKER_TYPE_TIME,
                //useSpinner for Android Only
                useSpinner : true,
                value : timeInField === '00:00:00' ? new Date() : tvalue, 
                selectionIndicator : true,
                bottom : 0,
              });
              cancel.addEventListener('click', function(e) {
                textField.setValue(timeInField);
                picker.hide();
                toolbar1.hide();
              });
              picker.addEventListener('change', function() {
                var d = new Date(picker.getValue());
                hour = d.getHours();
                min = d.getMinutes();
                milli = d.getMilliseconds().toString();
                millid = milli.length >1 ? milli.substring(0, milli.length-1) : milli;
                textField.setValue(hour+':'+min+':'+millid);
              });
              done1.addEventListener('click', function(e) {
               var d = new Date(picker.getValue());
                hour = d.getHours();
                min = d.getMinutes();
                milli = d.getMilliseconds().toString();
                millid = milli.length >1 ? milli.substring(0, milli.length-1) : milli;
                textField.setValue(hour+':'+min+':'+millid);
                picker.hide();
                toolbar1.hide();
              });
               alert('Clicked on time field');
               Ti.API.info('Adding: picker to window' );
              self.add(picker);
              self.add(toolbar1);
              Ti.API.info('Picker should be shown' );
            });