The current xpath was the one for saas-6 or future 9.0 but didn't work
in version 8.
closes#7715
opw-645555
note: this commit should not be forward ported after 8.0
Pretty much completely rewritten theme with custom HTML translator and a
few parts of the old theme extracted to their own extensions.
Banner images thought not to be that huge after all, and not worth the
hassle of them living in a different repository.
co-authored with @stefanorigano
* The dashboard from the backend howto doesn't specify "name" field
which causes non-null constraint violation.
* Some useful examples uses idea.idea" model which isn't available in
8.0 so I replaced them with "note.note".
closes#3993