FEATURE: Chat and Sidebar are now on by default (#19406)

FEATURE: Chat and Sidebar are now on by default

- Set the sidebar site setting to be enabled by default
- Set the chat site setting to be enabled by default
- Updated existing specs that assumed the original default
- Use a migration to keep old defaults for existing sites

db/migrate/20221212225921_enable_sidebar_and_chat.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class EnableSidebarAndChat < ActiveRecord::Migration[7.0]
+  def up
+    result = execute <<~SQL
+      SELECT created_at
+      FROM schema_migration_details
+      ORDER BY created_at
+      LIMIT 1
+    SQL
+
+    # keep sidebar legacy and chat disabled for for existing sites
+    if result.first['created_at'].to_datetime < 1.hour.ago
+      execute <<~SQL
+        INSERT INTO site_settings(name, data_type, value, created_at, updated_at)
+        VALUES('chat_enabled', 5, 'f', NOW(), NOW())
+        ON CONFLICT (name) DO NOTHING
+      SQL
+      execute <<~SQL
+        INSERT INTO site_settings(name, data_type, value, created_at, updated_at)
+        VALUES('navigation_menu', 7, 'legacy', NOW(), NOW())
+        ON CONFLICT (name) DO NOTHING
+      SQL
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end