[TIMOB-13114] iOS: ScrollView with height:Ti.UI.SIZE will not scroll in window with vertical layout

Problem description

ScrollView does not scroll if Window layout is vertical and ScrollView height is set to Ti.UI.SIZE

Steps to reproduce

Use the following code:

var win = Titanium.UI.createWindow({
	layout:'vertical',
	backgroundColor: 'white'
});

var scrollView = Titanium.UI.createScrollView({
  contentWidth:'auto',
  contentHeight:'auto',
  top:0,
  height: Ti.UI.SIZE
});

var label = Ti.UI.createLabel({
	color: 'black',
	text: 'Ciao',
	top: 1000
});
scrollView.add(label);

win.add(scrollView);
win.open();

If you remove either layout:'vertical' from the Window, or height:Ti.UI.SIZE from the ScrollView it scrolls fine. Either combination works fine in Android. Reproduced in the file scroll_views_basic.js in Kitchen Sink 3.0.2