feat: Limit the number of custom filters per user (#7101)

config/locales/en.yml

@@ -70,6 +70,8 @@ en:
         connection_closed_error: Connection closed.
       validations:
         name: should not start or end with symbols, and it should not have < > / \ @ characters.
+    custom_filters:
+      number_of_records: Limit reached. The maximum number of allowed custom filters for a user per account is 50.
 
   reports:
     period: Reporting period %{since} to %{until}