Port SCSS changes from 1c113fd72d to glitch-soc

Conflicts:
- app/controllers/settings/follower_domains_controller.rb
  Removed upstream. Did the same here. Maybe we should not have?
- config/locales/en.yml
  Upstream removed the “Authorized followers” page and associated
  translations. This is too close in the file to our glitch-soc-specific
  “flavour” string. No actual conflict.
- config/locales/ja.yml
  Same as above.
- config/locales/pl.yml
  Same as above.
- config/navigation.rb
  No real conflict. New route added too close to the glitch-soc-specific
  “flavours” one.
- config/webpack/configuration.js
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.
- config/webpack/loaders/babel.js
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.
  The contents of this file have been moved to package.json.
- config/webpack/shared.js
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.
- config/webpacker.yml
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.
- jest.config.js
  The contents of this file have been moved to package.json.
- package.json
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.
- yarn.lock
  Upstream refactored the webpack(er) configuration quite a bit.
  Tried to keep up.

* perf: remove stats.json generation in webpack

* fix code comment

* Add specs for ActionLogHelper

* Make some methods private

methods below never referenced from outside of their module:

- #linkable_log_target
- #log_target_from_history

Bumps [webpacker](https://github.com/rails/webpacker) from 3.5.5 to 4.0.2.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v3.5.5...v4.0.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>
Co-authored-by: Yamagishi Kazutoshi <ykzts@desire.sh>

Bumps [aws-sdk-s3](https://github.com/aws/aws-sdk-ruby) from 1.31.0 to 1.32.0.
- [Release notes](https://github.com/aws/aws-sdk-ruby/releases)
- [Changelog](https://github.com/aws/aws-sdk-ruby/blob/master/gems/aws-sdk-s3/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-ruby/compare/1.31.0...v1.32.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bumps [oj](https://github.com/ohler55/oj) from 3.7.9 to 3.7.10.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ohler55/oj/compare/v3.7.9...v3.7.10)

Signed-off-by: dependabot[bot] <support@dependabot.com>

No more "Owned poll is invalid"

* Do not crash the whole UI when loading an invalid column

* Add error boundary component to catch Web UI crashes

* Add stack trace on supported browsers

* Add component stack info, pre-format everything for github

* Make “Reload” a clickable link that calls window.location.reload()

* Remove elephant friend from error boundary, make title stand out more

* Simplify error boundary to only a graphic

Use async worker for creating reblog notification to improve performance

Merge upstream changes

* Migrate existing `open_registrations` setting to the new `registrations_mode`

Fixes #10263

* Remove unrelated db changes that have creeped in

Port SCSS changes from 51e154f5e8 to glitch-soc

Port 6e3936aa6f to glitch-soc

Conflicts:
- app/views/admin/settings/edit.html.haml:
  Conflict due to how the theming settings change.

Fix #6856
Fix #6951

Bumps [rails](https://github.com/rails/rails) from 5.2.2 to 5.2.2.1. **This update includes security fixes.**
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](https://github.com/rails/rails/compare/v5.2.2...v5.2.2.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge upstream changes

* Add UI for enabling/disabling poll notifications

* Add poll notifications to the (advanced) quick filter bar

* Update poll notification message

“Your poll has ended” → “A poll you have voted in has ended”

* Clear up associated notifications when a poll is deleted

Merge upstream changes

Port 5b50c2cbaa to glitch-soc

Port da45b8b4c9 to glitch-soc

Port 65fffeac3f to glitch-soc

Conflicts:
- app/controllers/about_controller.rb
- app/controllers/tags_controller.rb
- app/views/about/show.html.haml
- spec/views/about/show.html.haml_spec.rb

* yarn manage:translations && i18n-tasks add-missing

* Update Japanese translations for new landing page.

I don't change the tagline from English yet.
I think that translating a tagline is difficult and requires time-consuming discussions.

Some translations related about the poll are already done in Weblate, so I will leave it as it is.

Bumps [active_record_query_trace](https://github.com/brunofacca/active-record-query-trace) from 1.6.1 to 1.6.2.
- [Release notes](https://github.com/brunofacca/active-record-query-trace/releases)
- [Changelog](https://github.com/brunofacca/active-record-query-trace/blob/master/HISTORY.md)
- [Commits](https://github.com/brunofacca/active-record-query-trace/compare/v1.6.1...v1.6.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

* Fix poll update handler calling method was that was not available

Fix regression from #10209

* Refactor VoteService

* Refactor ActivityPub::DistributePollUpdateWorker and optimize it

* Fix typo

* Fix typo