Mobile v2.0 (Phase 1)

Phase 1 of Mobile v2.0 will include:

First Impressions	Priority
App Icon	P0
Static Splash Screen	P0
Authentication
Adding a Server	P0
Login	P1
Reset Password	P1
Create an Account	P3
Navigation
Bottom Tab Bar	P0
Home View	P0
https://mattermost.atlassian.net/wiki/spaces/MSU/pages/1053327496	P1
Team Sidebar	P0
Multi-Server Support	P0
Main Tab Screens
Global Search Screen	P0
Account Screen	P0
Recent Mentions Screen	P0
Other UI Updates
Channel Header Updates	P0
Dark/Light Theme Syncing with OS	P1
Global banners - do we change this based on new update	P1
Updates to Share Extension to support multi-server	P1
Message Input Improvements	P2