Fix navigation around uploads and jobs

The uploads and jobs page should start showing in the _Uploads_ menu on
the left hand side.

If you’ve navigated to a job from the uploads page (ie you haven’t got
to that page because you’ve just sent the job) then you should see a
link back to the uploads page.

app/navigation.py

@@ -355,8 +355,6 @@ class MainNavigation(Navigation):
             'returned_letters',
             'service_dashboard',
             'template_usage',
-            'view_job',
-            'view_jobs',
             'view_notification',
             'view_notifications',
         },
@@ -390,6 +388,8 @@ class MainNavigation(Navigation):
             'upload_letter',
             'uploaded_letter_preview',
             'uploads',
+            'view_job',
+            'view_jobs',
         },
         'team-members': {
             'confirm_edit_user_email',