Small update mostly to fix some minor coding standard/doc standard issues (error and warnings - and while there fixing some old cs issues as well) about to be introduced in the pending release (#2321).

Most important though, look at the commit 4d05a6e.
We cannot really delete public methods on a minor version, even if it's highly unlikely anybody used them.
Also we want to deprecate them first, on a minor version, so that we can remove them on the next major version.

Also fixed some tests that broke after the recent codebase updates.

I reverted the changes to admin/views/dashboard.php as they are addressed in #2360 so to avoid conflicts.