Question Desk 2.28.0

Added

• QR sheets can hand over the codes as images. Download QR images saves one PNG per
  shareable-link session: the code with the session name under it and the event under that, so a
  code dropped into a slide, a poster or someone else's document still says what it is for. The
  files are named after both. The printed sheet is unchanged — it already names them above the
  code.

Changed

• The event's "Email QA Facilitators" message carries only queue links. Each facilitator
  gets the sessions they are running, each with its QA Facilitator queue link and nothing else;
  whoever runs the room takes the room screen link from the Sessions tab. Who receives what is
  unchanged: the list is built per session from that session's QA Facilitators, so nobody is
  sent a session they are not running (a facilitator assigned to the event itself is a
  facilitator for every session in it).