Add contest param for offline form participation

config/locales/en.yml

@@ -53,6 +53,8 @@ en:
       contest:
         lang: Language for the public scoreboard
         name: Name
+        offline_form: Enable the offline participation form
+        offline_form_description: Offline participants will have to fill the form by providing an image taken of the undone puzzle, and validate their finish time with an upload of an image of the completed puzzle
         public: Enable the public scoreboard
         team: Team contest
         team_description: For UI display purposes mainly
@@ -162,7 +164,9 @@ en:
       add_participant: Add participant
       add_puzzle: Add puzzle
       copy_extension_url: Copy the URL for connecting from the browser extension
+      open_offline_form: Open offline form
       open_public_scoreboard: Open public scoreboard
+      offline_form_disabled: The offline form is disabled
       public_scoreboard_disabled: The public scoreboard is disabled
       url_copied: URL copied to the clipboard
   contestants: