sidekiq.log in admin area. Improved admin dashboard

app/views/admin/logs/show.html.haml

@@ -5,6 +5,8 @@
     = link_to "application.log", "#application", 'data-toggle' => 'tab'
   %li
     = link_to "production.log", "#production", 'data-toggle' => 'tab'
+  %li
+    = link_to "sidekiq.log", "#sidekiq", 'data-toggle' => 'tab'
 
 %p.light To prevent perfomance issues admin logs output the last 2000 lines
 .tab-content
@@ -50,3 +52,17 @@
           - Gitlab::Logger.read_latest_for('production.log').each do |line|
             %li
               %p= line
+  .tab-pane#sidekiq
+    .file_holder#README
+      .file_title
+        %i.icon-file
+        sidekiq.log
+        .right
+          = link_to '#', class: 'log-bottom' do
+            %i.icon-arrow-down
+            Scroll down
+      .file_content.logs
+        %ol
+          - Gitlab::Logger.read_latest_for('sidekiq.log').each do |line|
+            %li
+              %p= line