Display status in admin console, Change the filters to include relevant fields, scopes for device status

config/application.rb

@@ -35,3 +35,4 @@ module OnemdmServer
     config.generators.helper = false
   end
 end
+STATUS_CLASSES ={active: :ok,missing: :warning,dead: :error}

config/environments/development.rb

@@ -39,4 +39,8 @@ Rails.application.configure do
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
   HEARTBEAT_INTERVAL = 1.minute
+
+  ACTIVE_TIMEFRAME = 1.hours
+  MISSING_TIMEFRAME = 2.hours
+
 end

config/environments/production.rb

@@ -77,4 +77,7 @@ Rails.application.configure do
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
   HEARTBEAT_INTERVAL = 1.hour
+
+  ACTIVE_TIMEFRAME = 12.hours
+  MISSING_TIMEFRAME = 48.hours
 end

config/environments/test.rb

@@ -40,4 +40,8 @@ Rails.application.configure do
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
   HEARTBEAT_INTERVAL = 1.hour
+
+  ACTIVE_TIMEFRAME = 12.hours
+  MISSING_TIMEFRAME = 48.hours
+
 end