Add OS Version and Client version to filter

app/admin/device.rb

@@ -26,6 +26,7 @@ ActiveAdmin.register Device do
     end    
     column "Model Name",:model
     column "IMEI Number",:imei_number
+    column :os_version
     column :created_at
     column :updated_at
     column :last_heartbeat_recd_time
@@ -35,6 +36,8 @@ ActiveAdmin.register Device do
   filter :created_at
   filter :updated_at
   filter :last_heartbeat_recd_time
+  filter :os_version
+  filter :client_version
   
   scope :active
   scope :missing