Add DM icon back on HTML view of DMs (#16086)

Fix regression from #16052

app/helpers/application_helper.rb

@@ -91,6 +91,8 @@ module ApplicationHelper
       fa_icon('unlock', title: I18n.t('statuses.visibilities.unlisted'))
     elsif status.private_visibility? || status.limited_visibility?
       fa_icon('lock', title: I18n.t('statuses.visibilities.private'))
+    elsif status.direct_visibility?
+      fa_icon('envelope', title: I18n.t('statuses.visibilities.direct'))
     end
   end
 

config/locales/en.yml

@@ -1260,6 +1260,7 @@ en:
     sign_in_to_participate: Sign in to participate in the conversation
     title: '%{name}: "%{quote}"'
     visibilities:
+      direct: Direct
       private: Followers-only
       private_long: Only show to followers
       public: Public