Don't give the user to edit rendered content

We render each entry – substitute shortcodes, YouTube
videos, add paragraphs, etc.

Currently, when we edit it, the rendered contents are
offered for edit. This is not very user-friendly, because
some of the substitutions are very unwieldily.

That's why we are now passing the original content, so
that we can give it to the user for editing.
Hide the Edit button when the edit form is active