Removed all govuk css (#2814)

* Removed all govuk css

* Updated reference files

* Removing govuk js

* Fixed casing for modules, removed unused page

* Got more reference images

* Updated template page

* Removed govuk padding util

* Updated hint to uswds hint

* More govuk cleanup

* Commiting backstopjs ref files

* Fixed all unit tests that broke due to brittleness around govuk styling

* Added new ref images

* Final removal of govuk

* Officially removed all govuk references

* Updated reference file

* Updated link to button

* UI modernization

* Cleanup

* removed govuk escaping tests since they are no longer needed

* Fix CodeQL security issue in escapeElementName function

- Escape backslashes first before other special characters
- Prevents potential double-escaping vulnerability
- Addresses CodeQL alert about improper string escaping

* Found more govuk removal. Fixed unit tests

* Add missing pipeline check to pre-commit

* updated test

* Updated e2e test

* More update to e2e test

* Fixed another e2e test

* Simple PR comments addressed

* More updates

* Updated backstop ref files

* Refactored folder selection for non-admins

* Updated redundant line

* Updated tests to include correct mocks

* Added more ref files

* Addressing carlos comments

* Addressing Carlo comments, cleanup of window initing

* More cleanup and addressing carlo comments

* Fixing a11 scan

* Fixed a few issues with javascript

* Fixed for pr

* Fixing e2e tests

* Tweaking e2e test

* Added more ref files and cleaned up urls.js

* Fixed bug with creating new template

* Removed brittle test - addressed code ql comment

* e2e race condition fix

* More e2e test fixes

* Updated e2e tests to not wait for text sent

* Updated test to not wait for button click response

* Made tear down more resilent if staging is down

* reverted e2e test to what was working before main merge

* Updated backstopRef images

* Updated gulp to include job-polling differently

app/__init__.py

@@ -102,22 +102,16 @@ from app.notify_client.organizations_api_client import organizations_client
 from app.notify_client.performance_dashboard_api_client import (
     performance_dashboard_api_client,
 )
-from app.notify_client.platform_stats_api_client import (
-    platform_stats_api_client,
-)
+from app.notify_client.platform_stats_api_client import platform_stats_api_client
 from app.notify_client.service_api_client import service_api_client
 from app.notify_client.status_api_client import status_api_client
-from app.notify_client.template_folder_api_client import (
-    template_folder_api_client,
-)
-from app.notify_client.template_statistics_api_client import (
-    template_statistics_client,
-)
+from app.notify_client.template_folder_api_client import template_folder_api_client
+from app.notify_client.template_statistics_api_client import template_statistics_client
 from app.notify_client.upload_api_client import upload_api_client
 from app.notify_client.user_api_client import user_api_client
 from app.url_converters import SimpleDateTypeConverter, TemplateTypeConverter
 from app.utils.api_health import is_api_down
-from app.utils.govuk_frontend_jinja.flask_ext import init_govuk_frontend
+from app.utils.nunjucks_jinja.flask_ext import init_nunjucks_environment
 from notifications_python_client.errors import HTTPError
 from notifications_utils import logging, request_helper
 from notifications_utils.formatters import (
@@ -246,7 +240,7 @@ def create_app(application):
     if "extensions" not in application.jinja_options:
         application.jinja_options["extensions"] = []
 
-    init_govuk_frontend(application)
+    init_nunjucks_environment(application)
     init_jinja(application)
 
     for client in (