- refactor: Gateway client connections

- update: notify via sound when no Gateway client connected

- update: improved the UI/UX for retrying failed messages - reduces the chances of error retries

- fix: secure request not goes to numbers which don't fit the E.16 format

- update: notify when message fails to send

- fix: remove refresh button from homescreen (should fix that refresh does not affect saved keys)

- fix: maintains the last used service provider during conversations for dual sims
