Merge #2158

2158: supply missing fields argument r=mergify[bot] a=ghostwheel42

## What type of PR?

bug-fix

## What does this PR do?

adds missing argument "fields" to login form.

### Related issue(s)

- closes #2155

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [ ] In case of feature or enhancement: documentation updated accordingly
- [ ] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Alexander Graf <ghostwheel42@users.noreply.github.com>

core/admin/mailu/sso/views/base.py

@@ -30,10 +30,10 @@ def login():
         username = form.email.data
         if username != device_cookie_username and utils.limiter.should_rate_limit_ip(client_ip):
             flask.flash('Too many attempts from your IP (rate-limit)', 'error')
-            return flask.render_template('login.html', form=form)
+            return flask.render_template('login.html', form=form, fields=fields)
         if utils.limiter.should_rate_limit_user(username, client_ip, device_cookie, device_cookie_username):
             flask.flash('Too many attempts for this user (rate-limit)', 'error')
-            return flask.render_template('login.html', form=form)
+            return flask.render_template('login.html', form=form, fields=fields)
         user = models.User.login(username, form.pw.data)
         if user:
             flask.session.regenerate()