Need page size change notification

[BobDickinson]

We have a mechanism via Page metrics to communicate the page size to the Synchro app, which we do on app startup. The problem is that on platforms where the page size can change during app execution (such as resizing a window on Windows or the web browser, or going to split-screen type execution in various tablet environments), this page size change is not communicated to the server/app.

On platforms like Windows and web, this can be tricky, since the page size notifications come very fast (faster than you'd want to round trip to the client). On those platforms, we need some way to throttle the page size updates so we're not sending them faster than we can round-trip (something like one update per second would be more than enough).