Simpler Trading

Fixes in this update:
- The app renews your login when you open it, so alerts and the feed keep updating.
- Your alert filter stays the way you set it.
- Push Notification Settings lists every room, and the switches match your settings.
- Remember me now saves only your email.
- Reinstalling the app gives a fresh login.
- Locking the phone with the app open no longer makes the screen flicker.
- The background connection notice is quieter and no longer badges the app icon.