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/main/views/jobs.py

@@ -90,10 +90,7 @@ def view_job(service_id, job_id):
             status=request.args.get('status', ''),
         ),
         partials=get_job_partials(job),
-        just_sent=bool(
-            request.args.get('just_sent') == 'yes'
-            and job.template_type == 'letter'
-        ),
+        just_sent=request.args.get('just_sent') == 'yes',
         just_sent_message=just_sent_message,
     )