[TIMOB-2910] iOS / iPad: setData in anything post 1.4.x flickers

setData() sometimes performs strange when using it in conjunction with a window focus event.

There have been a few reports of flickering and other odd behaviors on the q/a forums, i.e.:
http://developer.appcelerator.com/question/91471/updating-table-on-window-focus"> http://developer.appcelerator.com/question/91471/updating-table-on-...
http://developer.appcelerator.com/question/92611/tableview-rendering-async-since-150"> http://developer.appcelerator.com/question/92611/tableview-renderin...

In the specific case of a quickstart customer I am assisting, table row contents flicker when setData is called on a window focus event. Attached is a video to show you what it is doing.

His code is fairly abstracted out but here are some examples of his code: http://pastie.org/1485195">http://pastie.org/1485195

Most of his custom methods for creating rows, etc. are just wrappers for native Ti code. Nothing magical going on in the background - just stuff to help him manage the app. I can provide that if you need it.

---

Using the sample code below - on the sim the label positioned on the right hand side jumps over to the right - http://screencast.com/t/nsqmRxa37Z">http://screencast.com/t/nsqmRxa37Z. On the device this does not happen but a black area flickers for a short bit. (see attached video)

Below is some sample code to run. It doesn't duplicate some of the issues exactly but does still show a few oddities (in both the sim and device) as mentioned above:

var win = Titanium.UI.currentWindow;

var rows = [];

var tableview = Ti.UI.createTableView();

for (var i=0; i < 10; i++) {
    var row = Ti.UI.createTableViewRow({
        left: 0,
        top: 0,
        height: 50, 
        width: '100%',
        separatorStyle: Ti.UI.iPhone.TableViewSeparatorStyle.NONE, 
        backgroundColor: 'transparent', 
        color: 'Red',
        selectedBackgroundImage: ''
    });
    
    var label = Ti.UI.createLabel({top: 10, left: 10, height: 22, width: 100, color: '#444', text: 'sometext', font: {fontFamily: 'Helvetica Neue', fontSize:20, fontWeight:'bold'}, textAlign: 'left'});
    
    var label2 = Ti.UI.createLabel({top: 10, right: 10, height: 22, width: 100, color: '#444', text: 'sometext', font: {fontFamily: 'Helvetica Neue', fontSize:20, fontWeight:'bold'}, textAlign: 'left'});
    
    row.add(label);
    row.add(label2);
    
    rows.push(row);
};

var button = Ti.UI.createButton({
    title: "setData",
    width: 50,
    height: 50,
    top: 10,
    right: 10
});

win.addEventListener('focus', function() {
    setTimeout(function() {
        tableview.setData(rows);
    }, 1000);
});

button.addEventListener('click', function() {
    tableview.setData(rows);
});

tableview.addEventListener('click', function() {
    var newwin = Ti.UI.createWindow({
        title: 'New window',
        url: 'test.js'
    });
    Ti.UI.currentTab.open(newwin, { animated: true });
});

win.add(tableview);
win.add(button);