Question Desk 2.26.0

Changed

• The PowerPoint add-in shows any live web page, however the link is pasted. A link
  copied from a browser's address bar without its https:// (apnews.com) now works, and an
  http:// link is tried as https://, since a slide can only show secure pages. The setup
  form leads with "any live web page" and takes plain text — its old type="url" field
  silently refused bare domains. Question Desk session links are unchanged in every form
  (public, domain-scoped and guest page), and still get the live QR handling.
• A page that refuses to be framed is explained by name. Many sites (AP News, autismla.org
  and most news sites) send X-Frame-Options and simply stay blank inside a slide. While
  editing, the note now names the site and suggests a screenshot or the site's own embed link.
  Nothing an add-in can do about the header itself.

Added

• The add-in accepts a room screen link served by the WordPress version of Question Desk
  (in progress on the wordpress branch), and only the site actually on the slide may ask the
  add-in to reload — Google's pages, or that site.