contact directly all the Editors concerned by an article from its management page

[HeleneLowinger]

[https://gitlab.ccsd.cnrs.fr/ccsd/episciences/-/issues/322] Could we have, on the management page of an article, a "contact all editors" button, in the Editors section, under the names? The author complains about not having a proofreader yet, we should be able to contact the editors again without having to copy and paste their emails one by one)

[rtournoy]

Adding all editors in CC when writing to an editor.