* Fix misuse of foreign_type
* Fix use of removed "add_template_helper"
* Use response.media_type instead of response.content_type in tests
* Fix CSV export controller test on Rails 6
Rails 6 sets a "filename*" field in the Content-Disposition header to
explicitly encode the filename as UTF-8.
This changes checks the first part of the Content-Disposition header so
it matches in both Rails 5 and Rails 6.
* Fix emoji formatting with Rails 6
* Make emoji output more idiomatic and robust
* Switch from redis-rails gem to built-in Rails redis cache storage
- Reduce time-to-digest from 20 to 7 days
- Fetch mentions starting from +1 day since last login
- Fix case when last login is more recent than last e-mail
- Do not render all mentions, only 40, but show number in subject
- Do not send digest to moved accounts
- Do send digest to silenced accounts
* Dont use raise_error by itself (avoids warning)
* Add coverage for AccountFilter
* Improve coverage and refactor for Subscription#lease_seconds
* Improve coverage and refactor for NotificationMailer
* Simplify assignment of min/max threshold on subscription
* Rename admin.domain_block to admin.domain_blocks in prep for i18n improvement
* Use implicit controller/action path for i18n in admin/domain_blocks
* Add DomainBlock#accounts has_many
* Avoid i18n health warning for `en` locale by using symbol scope with :count
* Remove unused i18n key: plaintext_secret_html
* Remove unused i18n key two_factor_auth.warning
* Remove final will_paginate i18n keys
* Remove unused key two_factor_auth.recovery_codes
* Remove unused key: admin.reports.comment.none
* Remove unused reports. i18n namespace (moved to admin.reports)
* Ignore keys from locales which override activemodel and activerecord errors
* Revert "Remove unused key: admin.reports.comment.none"
This reverts commit 350ef2685f.
* Update i18n key reference to match moved location
* Add missing `en` keys to i18n
* Tell i18n-tasks to ignore missing attributes that dont need overwriting
* Add i18n-tasks unused to travis
