Fix UI of password change form as per https://github.com/wagtail/wagtail/pull/6702#issuecomment-823334786

Remove 'required' asterisks and auto-focus

wagtail/admin/forms/auth.py

@@ -1,5 +1,7 @@
 from django import forms
-from django.contrib.auth.forms import AuthenticationForm, PasswordResetForm
+from django.contrib.auth.forms import AuthenticationForm
+from django.contrib.auth.forms import PasswordChangeForm as DjangoPasswordChangeForm
+from django.contrib.auth.forms import PasswordResetForm as DjangoPasswordResetForm
 from django.utils.translation import gettext_lazy
 
 
@@ -24,7 +26,26 @@ class LoginForm(AuthenticationForm):
                 yield field_name, field
 
 
-class PasswordResetForm(PasswordResetForm):
+class PasswordResetForm(DjangoPasswordResetForm):
     email = forms.EmailField(
         label=gettext_lazy("Enter your email address to reset your password"),
         max_length=254, required=True)
+
+
+class PasswordChangeForm(DjangoPasswordChangeForm):
+    """
+    Since this is displayed as part of a larger form, this differs from the vanilla Django
+    PasswordChangeForm as follows:
+    * the old-password field is not auto-focused
+    * Fields are not marked as required
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        try:
+            del self.fields['old_password'].widget.attrs['autofocus']
+        except KeyError:
+            pass
+
+        self.fields['old_password'].required = False
+        self.fields['new_password1'].required = False
+        self.fields['new_password2'].required = False

wagtail/admin/views/account.py

@@ -4,7 +4,6 @@ from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth import update_session_auth_hash
 from django.contrib.auth import views as auth_views
-from django.contrib.auth.forms import PasswordChangeForm
 from django.db import transaction
 from django.http import Http404
 from django.shortcuts import redirect
@@ -15,7 +14,7 @@ from django.utils.translation import gettext as _
 from django.utils.translation import gettext_lazy, override
 from django.views.decorators.debug import sensitive_post_parameters
 
-from wagtail.admin.forms.auth import LoginForm, PasswordResetForm
+from wagtail.admin.forms.auth import LoginForm, PasswordChangeForm, PasswordResetForm
 from wagtail.admin.localization import get_available_admin_languages, get_available_admin_time_zones
 from wagtail.core import hooks
 from wagtail.core.models import UserPagePermissionsProxy