Revert "Merge branch '665-account-adapter-overwritten-for-invitations' into 'master'"

See merge request !988

This reverts merge request !986

Resolve "Account adapter overwritten for invitations"

Closes #665

See merge request !986

Merge branch '663-password-reset-cannot-be-enabled-disabled-independently-of-password-change' into 'master'

Resolve "Password reset cannot be enabled/disabled independently of password change"

Closes #663

See merge request !985

Allow scheduling notifications by setting a send datetime

See merge request !983

# Conflicts:
#   CHANGELOG.rst
#   aleksis/core/models.py

[Docs] Add missing bracket in config example

See merge request !984

Implement StaticContentWidget

Closes #662

See merge request !981

[Docs] Fix references

See merge request !982

Resolve "Add configurable username validator for signup"

Closes #664

See merge request !980

Update dependency django-phonenumber-field to v6

See merge request !774

Update dependency django-reversion to v5

See merge request !977

Fix typo

See merge request !979

[Docs] Fix redis address scheme

See merge request !978

Resolve "[AdditionalField] Allow setting `required` and `help_text`"

Closes #660

See merge request !976

Resolve "Feature: Account Menu in Top Navbar"

Closes #531

See merge request !907

# Conflicts:
#   CHANGELOG.rst

Resolve "Improve mobile design of login page"

Closes #572

See merge request !905

# Conflicts:
#   CHANGELOG.rst