Refs, Dev portal improvements and on-device testing, Fix crashes on disabling v8 race conditions, edgecase where history could be null, issue on starting Grayjay with an url

Fixed crash where it would fail to unregister audio noisy receiver. Fixed crash where system brightness setting does not exist.

Additional warnings for reinstall, disable uninstall if doesn't make sense, reduce maxheight to 40% of videoview

Fixed slide subscription overlay not closing on back gesture in video detail view. Fixed bottom margin for minimized view progress bar.