Change Flowdock name on users to discord name

[wdoug]

Issue

Flowdock is not used anymore and places where this is referenced should be changed to something relevant

Solution

• Change the text to "Discord"
• Either:
  • Tweak database table name to be more generic: workspaceChatUserName e.g.
  • Add new database column for Discord specifically and consider Flowdock to be archived
• Evaluate existing content and tweak/remove based on current need

Context