For devices that have a screen size so small they have to use the `max-width` property in CSS, the standard of a screen-size that has to be used here is `phones 600px and smaller`, not `900px`, which would have to use the `min-width` property instead, that would mean a widescreen size, because `min-width` means `a screen size of 900px, or more`, including desktops.
- Make it possible to insert new paragraphs in the article body
- Make it impossible to copy formatted HTML (to make media insertion from markdown code work correctly)
TODO:
- [x] make it possible to escape draft mode
- [x] display errors from the server
- [x] button to go back to the "normal" editor
- [x] Avoid publishing placeholders