HUD-only to include EVERY message

To have ALL messages hidden when using HUD-only mode.

Examples currently not hidden:

  • Watching rider
  • New accounts: Welcome to Zwift! Start pedaling to begin
  • New accounts: Hey! You’ve got km remaining
  • Back to me button
  • Quit event button

Example of HUD-only with messages shown: https://www.youtube.com/watch?v=0sGOt0yxhXk

No reason buttons can’t auto-hide like the other buttons.