Scaling issue for charts

This is now merged. Diagrams will always be rendered with a 16:9 aspect ratio, and there’s a button to pop them into a fullscreen view:

kanban
  Todo
    [Create Documentations]
    docs[Create Blog about the new diagrams]
  [In progress]
    id6[Create renderer so that it works in all cases. We also add som extra text here for testing purposes. And some more just for the extra flare.]
  id9[Ready for deploy]
    id8[Design grammar]@{ assigned: 'knsv' }
  id10[Ready for test]
    id4[Create parsing tests]@{ ticket: MC-2038, assigned: 'K.Sveidqvist', priority: 'High' }
    id66[last item]@{ priority: 'Very Low', assigned: 'knsv' }
  id11[Done]
    id5[define getData]
    id2[Title of diagram is more than 100 chars when user duplicates diagram with 100 char]@{ ticket: MC-2036, priority: 'Very High'}
    id3[Update DB function]@{ ticket: MC-2037, assigned: knsv, priority: 'High' }

  id12[Can't reproduce]
    id3[Weird flickering in Firefox]
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