[TIMOB-5750] iOS: A separator is displayed on the search results of a TableView.

// test program
var tabGroup = Titanium.UI.createTabGroup();
var win1 = Titanium.UI.createWindow({  
    title:'Tab 1',
    backgroundColor:'#fff'
});
var tab1 = Titanium.UI.createTab({  
    title:'Tab 1',
    window:win1
});

data = [
	{ title: 'a1', header: 'a' },
	{ title: 'a2' },
	{ title: 'a3' },
	{ title: 'a4' },
	{ title: 'a5' },
	{ title: 'b1', header: 'b' },
	{ title: 'b2' },
	{ title: 'b3' },
	{ title: 'b4' },
	{ title: 'b5' },
	{ title: 'c1', header: 'c' },
	{ title: 'c2' },
	{ title: 'c3' },
	{ title: 'c4' },
	{ title: 'c5' },
];
index = [
	{ title: 'a', index: 0 },
	{ title: 'b', index: 5 },
	{ title: 'c', index: 10 }
];

var search = Ti.UI.createSearchBar({
	showCancel: false,
	filterAttribute: 'title'
});

var tableView = Ti.UI.createTableView({
	data: data,
	index: index,
	search: search
});

win1.add(tableView);

tabGroup.addTab(tab1);  
tabGroup.open();