Tendenci

* Updated membership backend UX
* Meta title update for articles and news - removed the 100 characters limit and the silly "..."
* Removed the themes dropdown on theme editor
* Fixed a IllegalMonthError at events month view (ex: /events/2020/0/)
* Fixed a AttributeError at photos zip
* Avoided a DataError at get_email command
* Fixed a TypeError for forms

* Updated django version to 2.2.12
* Some bugfixes for profiles and groups permission edit
* Fixed a TypeError when payment is not fully set up
* Updated format for the groups perms edit
* Appended ?rel=0 to avoid unrelated youtube videos being displayed when video finishes

* Renamed tendenci2018 theme to tendenci2020
* Replaced http:// with https:// for urls
* Corrected batchsize option for process_unindexed command
* Fixed a DataError for event_logs
* Avoided value exceeding FIELD_MAX_LENGTH for forms
* Resolved some migration warnings

* Requires Django 2.2. Django 1.11 is no longer supported.
* T11 sites can be smoothly migrated to T12. For migration, please follow the guide in docs/source/upgrade/upgrade-to-tendenci12.txt.

* Included region field to profiles export
* Added a setting "Pre-populate Corporate Profile to Individual Membership's Application" to allow you to turn on or off the behavior of pre-populating corporate profile to individual membership's application
* Removed anonymous user access to payments (Thanks AdamBark)
* Updated dependencies (including django to 1.11.28) in requirements.txt
* Resolved some RemovedInDjango20Warning
* Fixed an AttributeError for list_corporate_memberships
* Fixed UnserializableContentError for /pages/feed/

* Handled the case in event registrations when management forms are tampered maliciously