Improve bookmark form accessibility (#1116)

* Bump Django

* Render error messages in English

* Remove unused USE_L10N option

* Associate errors and help texts with form fields

* Make checkbox inputs clickable

* Change cancel button text

* Fix tests

bookmarks/frontend/behaviors/tag-autocomplete.js

@@ -19,6 +19,7 @@ class TagAutocomplete extends Behavior {
         name: input.name,
         value: input.value,
         placeholder: input.getAttribute("placeholder") || "",
+        ariaDescribedBy: input.getAttribute("aria-describedby") || "",
         variant: input.getAttribute("variant"),
       },
     });