Refactor PasswordResetView

src/backoffice/locale/de/LC_MESSAGES/django.po

src/backoffice/locale/en/LC_MESSAGES/django.po

src/backoffice/templates/registration/password_reset.html

src/backoffice/templates/registration/reset_password.html

...backoffice/templates/registration/reset_password_mail.txt

...koffice/templates/registration/reset_password_subject.txt

src/backoffice/views/auth.py

src/core/forms.py

src/core/locale/de/LC_MESSAGES/django.po

src/core/locale/en/LC_MESSAGES/django.po

...ore/templates/registration/core_password_reset_email.html

...re/templates/registration/core_password_reset_subject.txt

src/core/views/__init__.py

src/core/views/auth.py

...nui/jinja2/plainui/registration/password_reset_email.html

...inui/jinja2/plainui/registration/password_reset_form.html

...ui/jinja2/plainui/registration/password_reset_subject.txt

src/plainui/locale/de/LC_MESSAGES/django.po

src/plainui/locale/en/LC_MESSAGES/django.po

src/plainui/views.py