jobs: show retried jobs in /jobs listing.

Fix the /jobs listing to show retried jobs. GoodJob::ActiveJobJob has a
default scope that filters out retried jobs; remove it in the index
controller so we can see retried jobs.

Also fix mail delivery jobs not showing up in the dropdown in the /jobs
search form.

app/controllers/jobs_controller.rb

@@ -4,7 +4,7 @@ class JobsController < ApplicationController
   respond_to :html, :xml, :json, :js
 
   def index
-    @jobs = authorize BackgroundJob.paginated_search(params)
+    @jobs = authorize BackgroundJob.unscoped.paginated_search(params)
     respond_with(@jobs)
   end
 

app/jobs/application_job.rb

@@ -35,7 +35,7 @@ class ApplicationJob < ActiveJob::Base
       RegeneratePostJob, RetireTagRelationshipsJob,
       UploadPreprocessorDelayedStartJob, UploadServiceDelayedStartJob,
       VacuumDatabaseJob, DiscordNotificationJob, BigqueryExportJob,
-      ProcessBulkUpdateRequestJob, PruneJobsJob
+      ProcessBulkUpdateRequestJob, PruneJobsJob, ActionMailer::MailDeliveryJob
     ]
   end
 end

app/models/background_job.rb

@@ -27,7 +27,7 @@ class BackgroundJob < GoodJob::ActiveJobJob
       end
 
       def name_matches(name)
-        class_name = name.tr(" ", "_").camelize + "Job"
+        class_name = name.tr(" ", "_").classify + "Job"
         where_json_contains(:serialized_params, { job_class: class_name })
       end