update gems; fix timeout errors

app/admin/channel.rb

@@ -12,7 +12,7 @@ ActiveAdmin.register Channel do
     column(:user) { |channel| link_to channel.user.login, admin_user_path(channel.user) if channel.user.present? }
     column :public_flag
     column :created_at
-    default_actions
+    actions
   end
 
   form do |f|

app/admin/failedlogin.rb

@@ -12,7 +12,7 @@ ActiveAdmin.register Failedlogin do
     column :password
     column :ip_address
     column :created_at
-    default_actions
+    actions
   end
 
 end

app/admin/plugin.rb

@@ -10,7 +10,7 @@ ActiveAdmin.register Plugin do
     column(:user) { |object| link_to object.user.login, admin_user_path(object.user) if object.user.present? }
     column :name
     column :private_flag
-    default_actions
+    actions
   end
 
   form do |f|

app/admin/user.rb

@@ -12,7 +12,7 @@ ActiveAdmin.register User do
     column :email
     column :login
     column :created_at
-    default_actions
+    actions
   end
 
   show do