[TIMOB-10474] iOS: Semi-opaque TableViewRow backgroundColor doesn't play nice with title attribute

Problem

When applying a semi opaque backgroundColor to a tableViewRow in conjunction with the title attribute, the backgroundColor is not rendered properly.

Actual

The title area of the row is applied the same backgroundColor as the row, resulting in a more opaque background. For example, if the color #50000000 is used, the table row background color is rendered 50% black, however the title area of the row is also rendered with 50% black background, resulting in a 75% black background due to the underlying row color.

Expected

The title area of a row should have no background color rendered to it.

Repro sequence

// this sets the background color of the master UIView (when there are no windows/tab groups on it)
Titanium.UI.setBackgroundColor('#000');
//
var win = Titanium.UI.createWindow({  
    title:'Tab 1',
  
});

var tbl = Ti.UI.createTableView()
win.add(tbl);

var tblData = [];

var row = Ti.UI.createTableViewRow({
	title: 'testing 123',
	backgroundColor: '#50000000'
});

tblData.push(row);
tbl.setData(tblData);

win.open();

Tested on

iOS 5.1 simulator

From the color section in the docs for on Titanium.UI:

"An additional alpha channel is supported as a prefix to the hex triplet. So, to make the purple-like color '#ff00ff' semi-opaque, you could use an alpha value of '55', giving, '#55ff00ff' or '#5f0f'."