New Status Bar behaviour (hide status bar by default)

[giomfo]

• Status bar is hidden by default. It appears only for:
  • Error messages (e.g. the "connectivity failure" warning)
  • "You have N unread messages" (when scrolled up the page)
  • "Matthew and 5 others are typing" (but only when scrolled up the page)
• Typing notifications are shown like the iMessage ellipsis chat bubble, as a phantom inline message in the timeline. To stop the timeline bouncing up and down as people start and stop typing, we debounce the timeline animation - after making room for the typing notification by scrolling up, the timeline waits N seconds (if at all?) to scroll back down again.

see element-hq/element-web#1991