Move active flow and interruption into chat, make temba-user fetch individually

[ericnewcomer]

rapid

• Add interrupt modal
• Switch interrupt to use uuid
• Add email filtering for api users
• Fix safari font rendering

temba-components

• TembaUser now fetches each user on demand and monitors Store for changes
• Active flow now visible on contact chat / tickets
• Add option to show interrupt button that can trigger an event
• Add built-in alpha sort option for select
• Fix race condition with store fetching/caching for requests to the same endpoint in quick succession
• Fix leaked ContactHistory component with ongoing updates/fetches

flow-editor

• clear activity timeout on unmount