Slider on "property: zoom" page not working

When you move the slider on the page "property: zoom" nothing happens.

As I understand from the source of the tabris-maps widget, zooming on iOS works different from the zoom levels that are used on Android. Instead of zoom levels, a region has to be selected to define a specific zoom state.

The zoom page should either be implemented in a platform specific way or we should come up with a unified API to define the zoom state on a map that works reliable on both platforms.