hide "Extras" row if there is nothing to show

lib/sidekiq/web.rb

@@ -107,15 +107,16 @@ module Sidekiq
         args.map { |arg| a = arg.inspect; a.size > count ? "#{a[0..count]}..." : a }.join(", ")
       end
 
-      def display_extra_items(retry_job)
-        regular_keys = [
-          "queue", "class", "args", "retry_count", "retried_at", "failed_at",
-          "retry", "jid", "error_message", "error_class", "backtrace", "error_backtrace"
-        ]
+      RETRY_JOB_KEYS = [
+        "queue", "class", "args", "retry_count", "retried_at", "failed_at",
+        "retry", "jid", "error_message", "error_class", "backtrace",
+        "error_backtrace", "unique", "enqueued_at"
+      ]
 
-        {}.tap do |extra|
+      def retry_extra_items(retry_job)
+        @retry_extra_items ||= {}.tap do |extra|
           retry_job.item.each do |key, value|
-            extra[key] = value unless regular_keys.include?(key)
+            extra[key] = value unless RETRY_JOB_KEYS.include?(key)
           end
         end
       end

web/views/retry.slim

@@ -19,10 +19,11 @@ table class="retry table table-bordered table-striped"
       th JID
       td
         code= @retry.jid
-    tr
-      th = t('Extras')
-      td
-        code= display_args(display_extra_items(@retry), 1000)
+    - unless retry_extra_items(@retry).empty?
+      tr
+        th = t('Extras')
+        td
+          code= display_args(retry_extra_items(@retry), 1000)
     - if @retry['retry_count'] > 0
       tr
         th = t('RetryCount')