Rebase to current 4.3.0-alpha-glitch-soc, update theming files

app/lib/admin/system_check.rb.orig

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Admin::SystemCheck
+  ACTIVE_CHECKS = [
+<<<<<<< HEAD
+    Admin::SystemCheck::SoftwareVersionCheck,
+=======
+>>>>>>> 6a7b91a03 (Add warning for object storage misconfiguration (#24137))
+    Admin::SystemCheck::MediaPrivacyCheck,
+    Admin::SystemCheck::DatabaseSchemaCheck,
+    Admin::SystemCheck::SidekiqProcessCheck,
+    Admin::SystemCheck::RulesCheck,
+    Admin::SystemCheck::ElasticsearchCheck,
+  ].freeze
+
+  def self.perform(current_user)
+    ACTIVE_CHECKS.each_with_object([]) do |klass, arr|
+      check = klass.new(current_user)
+
+      if check.skip? || check.pass?
+        arr
+      else
+        arr << check.message
+      end
+    end
+  end
+end