Merge pull request #430 from opensafely-core/evansd/warning-fix

Use context var rather than removed method

airlock/templates/file_browser/index.html

@@ -113,7 +113,7 @@
           {% if release_request.status.name %}
             data-request-status="{{ release_request.status.name }}"
           {% endif %}
-          {% if release_request.all_files_reviewed %}
+          {% if user_has_reviewed_all_files %}
             data-all-files-reviewed="true"
           {% endif %}
           {% if release_request.all_files_approved %}