better signature and more migrations

app/helpers/admin/application_helper.rb

app/views/admin/application/a11y/_widget.html.erb

app/views/admin/application/featured_image/_edit.html.erb

app/views/admin/application/featured_image/_show.html.erb

app/views/admin/application/meta_description/_form.html.erb

app/views/admin/application/meta_description/_show.html.erb

app/views/admin/application/summary/_show.html.erb

app/views/admin/communication/blocks/_list.html.erb

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

...dmin/communication/websites/pages/show/_metadata.html.erb

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

app/views/admin/communication/websites/posts/index.html.erb

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

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

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

app/views/admin/dashboard/index.html.erb

app/views/admin/education/schools/_form.html.erb

app/views/admin/education/schools/roles/_form.html.erb

...dmin/education/schools/roles/_involvement_fields.html.erb

app/views/admin/education/schools/show.html.erb