Merge pull request #15888 from edx/LEARNER-1510

Add back expression filter

lms/templates/dashboard/_reason_survey.html

+<%page expression_filter="h"/>
 <%!
 from django.utils.translation import ugettext as _
 %>

scripts/xsslint_thresholds.json

@@ -13,7 +13,7 @@
         "mako-invalid-js-filter": 192,
         "mako-js-html-string": 0,
         "mako-js-missing-quotes": 0,
-        "mako-missing-default": 185,
+        "mako-missing-default": 182,
         "mako-multiple-page-tags": 0,
         "mako-unknown-context": 0,
         "mako-unparseable-expression": 0,