Simplification des réglages de site (#2382)

app/controllers/admin/communication/websites_controller.rb

app/views/admin/communication/websites/_form.html.erb

app/views/admin/communication/websites/edit.html.erb

...views/admin/communication/websites/edit_language.html.erb

...iews/admin/communication/websites/edit_technical.html.erb

...iews/admin/communication/websites/form/_features.html.erb

app/views/admin/communication/websites/new.html.erb

...in/communication/websites/posts/categories/index.html.erb

app/views/admin/communication/websites/show.html.erb

...gation/admin/communication/website/settings_navigation.rb

config/routes/admin/communication.rb