[TIMOB-7893] iOS: UI.ScrollView - canCancelEvents property does not work

   var win = Ti.UI.createWindow({
       backgroundColor: '#fff'
   });
    
   var status = Ti.UI.createLabel({
       text: ' ', textAlign: 'center',
       zIndex: 1,
       right: 0, bottom: 0, left: 0,
       height: 60,
       backgroundColor: 'black',
       color: 'white'
   });
   win.add(status);
    
   var scroll = Ti.UI.createScrollView({
       scrollType: 'vertical',
       contentHeight: 3010,
       canCancelEvents: false,
       bottom: 60
   });
   
   var width = 150, height = 90;
   for (var i = 0; i < 30; i++) {
       scroll.add(Ti.UI.createLabel({
           draggable: true,
           text: 'Drag Me Horizontally ' + (i + 1), textAlign: 'center',
           color: '#000',
           top: i * 100 + 10,
           width: width, height: height,
           backgroundColor: '#eee'
       }));
   }
   scroll.addEventListener('touchstart', curry('Touch Start'));
   scroll.addEventListener('touchmove', curry('Touch Move'));
   scroll.addEventListener('touchcancel', curry('Touch Cancel'));
   scroll.addEventListener('touchend', curry('Touch End'));
   win.add(scroll);
   win.open();
    
   function curry(eventName) {
       return function (evt) {
       	// Ti.API.info('Event Fired On: ' + eventName);
           if (evt.source && evt.source.draggable) {
               status.text = eventName + ' at { x: ' + (evt.x | 0) + ', y: ' + (evt.y | 0) + ' }';
               var global = evt.source.convertPointToView({ x: evt.x, y: evt.y }, scroll);
               evt.source.left = global.x - width / 2;
           }
       }
   }