[TIMOB-6791] iOS: textArea should accept borderStyles being set just as textField does

TextArea does not accept borderStyle as TextField does. Both TextArea and TextField should react the same way to borderStyle being set.

Steps

Step 1: run the code below Step 2: notice that there is no border on the textArea Step 3: change createTextArea to createTextField Step 4: run the code again Step 5: notice that the textField does have a border They should both have the same border.

var win = Ti.UI.createWindow({backgroundColor:'black'});
var text = UI.Ti.UI.createTextArea({
	height:60,
	width:250,
	backgroundColor: 'white,
	borderStyle:Titanium.UI.INPUT_BORDERSTYLE_ROUNDED
});
win.add(text);
win.open();