Authentification : container trop large (#2210)

* resized container

* added vertical space

* use @small_content in devise override

* added maxlength

* Fix #2154

* br

* message

* alphabetical

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Co-authored-by: Arnaud Levy <arnaud.levy@noesya.coop>
Co-authored-by: Arnaud Levy <contact@arnaudlevy.com>