[TIMOB-16254] iOS: Dynamic operations of the Coverflow, result in flickering effect

Issue description

Developer need to display 2 set of images of the Coverflow component using a similar approach as seen at Kitchen Sink demo I.E. https://github.com/appcelerator/KitchenSink/blob/master/Resources/ui/handheld/ios/baseui/coverflow_replace.js#L42 Basically to add/remove elements into an existing Coverflow object they switch from a 4-image-array to a 3-image-array the last two images of the first array will still be present and to avoid that tried the work around by going to the end of the array and back to 0. That produces visual glitch. A possible solution, was to dump out array of images although an array bound exception error keeps coming (Without this work around no issues are found but it can take several clicks to refresh the Component): {quote} [ERROR] : attempt to select index: -1 that is out of bounds. Number of images: 4 or 3 {quote}

Steps to reproduce

1) Get stripped down sample attached (includes app.js with 7 images of Coverflow) 2) Slide either left or right of Coverflow object 3) Attempt to click 'change' to activate event listener 4) Monitor Studio console. From time to time set of images wouldn't be refreshed or exceptions thrown.