12.0-dev
templates: Move support templates to /templates/corporate/support.
confirm_email_change: Use redirect-to-POST trick.
portico: Document SCIM group sync on plans page.
webhooks/freshdesk/doc.md: Remove unescape_rendered_html kludge.
templates: Remove "no-validation" class.
starlight_help: Forward to help_center_port in case of dev server.
templates: Move remote_realm_server_mismatch_error.html to zerver.
Add a tool to draw the Django template inheritance graph
portico_error_pages: Collect zerver error pages into a folder.
web: Sync content of Django and nginx error pages.