Amélioration de la gestion des blocks (#2133)

* One nice step

* fix spacings

* Update app/views/admin/communication/blocks/templates/features/_snippet.html.erb

* Update app/views/admin/communication/blocks/templates/projects/_snippet.html.erb

* Update app/views/admin/communication/blocks/_block.html.erb

* Update app/views/admin/communication/blocks/templates/chapter/_snippet.html.erb

* Update app/views/admin/communication/blocks/templates/chapter/_snippet.html.erb

* fix

---------

Co-authored-by: Sébastien Gaya <sebastien.gaya@gmail.com>