eMail form in profile.html

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

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

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

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

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

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

src/plainui/forms.py

src/plainui/jinja2/plainui/profile.html

src/plainui/views.py