Merge pull request #1455 from noesya/block-posts-categories

app/models/communication/block/template/agenda.rb

app/models/communication/block/template/post.rb

...n/communication/blocks/components/option/_static.html.erb

...dmin/communication/blocks/templates/agenda/_edit.html.erb

...n/communication/blocks/templates/agenda/_snippet.html.erb

...in/communication/blocks/templates/agenda/_static.html.erb

...admin/communication/blocks/templates/posts/_edit.html.erb

...in/communication/blocks/templates/posts/_snippet.html.erb

...min/communication/blocks/templates/posts/_static.html.erb

config/locales/communication/contents/en.yml

config/locales/communication/contents/fr.yml