[TIMOB-14917] iOS: PIcker doesn't update when removeRows() is called.

var win = Ti.UI.createWindow({
  layout: 'vertical'
});
 
var picker = Ti.UI.createPicker({
  useSpinner: true
});
 
var fruit = [ 'Bananas', 'Strawberries', 'Mangos', 'Grapes' ];
var column1 = Ti.UI.createPickerColumn();
 
for(var i=0, ilen=fruit.length; i<ilen; i++){
  var row = Ti.UI.createPickerRow({title: fruit[i]});
  column1.addRow(row);
}
 
picker.add([column1]);
win.add(picker);
win.open();
 
var btn = Ti.UI.createButton({
    title: "Remove columns"
});
btn.addEventListener('click', function() {
    var _col = picker.columns[0];
    var len = _col.rowCount;
    for(var x = len-1; x >= 0; x-- ){
        var _row = _col.rows[x];
        _col.removeRow(_row);
    }
});
win.add(btn);