Simplify notification subscription (zulip#1848)

Use PendingNotifications to narrow from notifications (zulip#1830)

Do not mark messages in outbox as read (zulip#1814)

 webView: Implement longPress method. (zulip#1788)

* webView: Implement longPress method.

* Fix: typo in intl.

* Fix: regressions due to rebase.

* Fix: flow errors.

* Moved longPress implementation to MessageConatiner.

* Revert back unwanted changes.

* Fix: regressions related to onLongPress in render-native.

Fix fetching and loading visuals not updating (zulip#1768)

Add validations and error handling to stream creation (zulip#1492)

Add instructions on how to join Android Beta and iOS TestFlight (zuli…

…p#1474)

Simplify and fix focusPing (zulip#1468)

Fix account switching. Do not navigate if last route is the same (zul…

…ip#1418)

[Android] Scroll to first unread message. (zulip#1389)

* [Android] Scroll to first unread message.

* Position first unread message at the middle of the screen.

* Send scroll events when scrollView does not occupy full screen.

As user as seen those messages so mark them as read.

* Scroll to end if first unread message is not found.

Currently assuming that if first unread message is not found than all are read.

* Completed.

*Added comments.

*Reverted unwanted changes.

* Fix: not scrolled to first unread message just after app launch.