TableView header delimiter double-click works incorrectly for 1 and 2 rows

import QtQuick 2.1
import QtQuick.Controls 1.0

TableView
{
    width: 800
    height: 600
    model: ListModel {
        ListElement
        {
            column1: "111111111111111"
            column2: "1"
        }
        ListElement
        {
            column1: "1111111111111111111111111111111111111"
            column2: "1"
        }
        ListElement
        {
            column1: "1111111111111111111111"
            column2: "1"
        }
    }
    TableViewColumn {
        role: "column1"
        title: "column1"
        width: 120
    }
    TableViewColumn {
        role: "column2"
        title: "column2"
        width: 120
    }
}