Clarifies wording on pending imports

Fixes #1118

bookwyrm/views/import_data.py

@@ -78,13 +78,15 @@ class ImportStatus(View):
 
     def get(self, request, job_id):
         """status of an import job"""
-        job = models.ImportJob.objects.get(id=job_id)
+        job = get_object_or_404(models.ImportJob, id=job_id)
         if job.user != request.user:
             raise PermissionDenied
+
         try:
             task = app.AsyncResult(job.task_id)
         except ValueError:
             task = None
+
         items = job.items.order_by("index").all()
         failed_items = [i for i in items if i.fail_reason]
         items = [i for i in items if not i.fail_reason]