FEATURE: Offline indicator (#21369)

config/locales/client.en.yml

@@ -2070,6 +2070,10 @@ en:
       intro: "Hello! Looks like you’re enjoying the discussion, but you haven’t signed up for an account yet."
       value_prop: "Tired of scrolling through the same posts? When you create an account you’ll always come back to where you left off. With an account you can also be notified of new replies, save bookmarks, and use likes to thank others. We can all work together to make this community great. :heart:"
 
+    offline_indicator:
+      no_internet: "No internet connection."
+      refresh_page: "Refresh page"
+
     summary:
       enabled_description: "You're viewing a summary of this topic: the most interesting posts as determined by the community."
       description:

config/locales/server.en.yml

@@ -2343,6 +2343,7 @@ en:
     default_text_size: "Text size which is selected by default"
 
     default_title_count_mode: "Default mode for the page title counter"
+    enable_offline_indicator: "Display a message to users when it is detected that they have no network connection"
 
     retain_web_hook_events_period_days: "Number of days to retain web hook event records."
     retry_web_hook_events: "Automatically retry failed web hook events for 4 times. Time gaps between the retries are 1, 5, 25 and 125 minutes."

config/site_settings.yml

@@ -341,7 +341,7 @@ basic:
     list_type: compact
     default: "14"
     allow_any: false
-    refresh: true  
+    refresh: true
   enable_bookmarks_with_reminders:
     client: true
     default: true
@@ -2701,6 +2701,9 @@ user_preferences:
     choices:
       - notifications
       - contextual
+  enable_offline_indicator:
+    default: false
+    client: true
 api:
   retain_web_hook_events_period_days:
     default: 30