Instead of using pointer-events: none to disable unwanted clicks which
can cause flickering, we’re now using a click-block div that covers the
view during transitions. Similar concept to pointer-events: none
applied to the body tag, but in tests its showing to be more effective
to not cause any flickers.
Many services/directives have to interact with the body element, and
each one has to write the same long code. The $ionicBody service
provides some useful methods to clean up and reduce redundant code.
