Fixes #13150

* Fix account search with no query

Modeled after #12541. Fix #12548

* fix codeclimate

* Add ability to add oneself to lists

* Change search results to include oneself when searching through followers

* Mark follow relation as optional in ListAccount

* Fallback to Database search when ES not available

* Prevent double work if ES gives 0 result

* Apply suggestion from code review

* Add more accurate hashtag search

Using ElasticSearch to index hashtags with edge n-grams and score
them by usage within the last 7 days since last activity. Only
hashtags that have been reviewed and are listable can appear in
searches, unless they match the query exactly

* Fix search analyzer dropping non-ascii characters

- Restrict followers counts to local users to minimize local advantage
- Fix emoji shortcodes causing error in search
- Fix search syntax parse errors not being caught

* Add more accurate account search

When ElasticSearch is available, a more accurate search is implemented:

- Using edge n-gram index for acct and display name
- Using asciifolding and cjk width normalization on display names
- Using Gaussian decay on account activity for additional scoring (recency)
- Using followers/friends ratio for additional scoring (spamminess)
- Using followers number for additional scoring (size)

The exact match precedence only takes effect when the input conforms
to the username format and the username part of it is complete, i.e.
when the user started typing the domain part.

* Support single-letter usernames

* Fix tests

* Fix not picking up account updates

* Add weights and normalization for scores, skip zero terms queries

* Use local counts for accounts index, adjust search parameters

* Fix mistakes

* Using updated_at of accounts is inadequate for remote accounts

Fix #11365

* Revert "Fix filtering of favourited_by, reblogged_by, followers and following (#10447)"

This reverts commit 120544067f.

* Revert "Hide blocking accounts from blocked users (#10442)"

This reverts commit 62bafa20a1.

* Improve blocked view of profiles

- Change "You are blocked" to "Profile unavailable"
- Hide following/followers in API when blocked
- Disable follow button and show "Profile unavailable" on public profile as well

* Revert "Add indication that you have been blocked in web UI (#10420)"

This reverts commit bd02ec6daa.

* Revert "Add `blocked_by` relationship to the REST API (#10373)"

This reverts commit 9745de883b.

* Hide blocking accounts from search results

* Filter blocking accouts from account followers

* Filter blocking accouts from account's following accounts

* Filter blocking accounts from “reblogged by” and “favourited by” lists

* Remove blocking account from URL search

* Return 410 on trying to fetch user data from a user who blocked us

* Return 410 in /api/v1/account/statuses for suspended or blocking accounts

* Fix status filtering when performing URL search

* Restore some React improvements

Restore some cleanup from bd02ec6daa

* Refactor by adding `without_blocking` scope

* Add type, limit, offset, min_id, max_id, account_id to search API

Fix #8939

* Make the offset work on accounts and hashtags search as well

* Assure brakeman we are not doing mass assignment here

* Do not allow paginating unless a type is chosen

* Fix search query and index id field on statuses instead of created_at

The service used to be named ResolveRemoteAccountService resolves local
accounts as well.

* Strip leading & trailing spaces from account query

* Strip leading & trailing spaces from tag search

* Add list of lists component to web UI

* Add list adding

* Add list removing

* List editor modal

* Add API account search limited by following=true relation

* Rework list editor modal

* Remove mandatory pagination of GET /api/v1/lists/:id/accounts

* Adjust search input placeholder

* Fix rspec (#5890)

* i18n: (zh-CN) Add missing translations for #5811 (#5891)

* i18n: (zh-CN) yarn manage:translations -- zh-CN

* i18n: (zh-CN) Add missing translations for #5811

* Fix some issues

- Display loading/missing state for list timelines
- Order lists alphabetically in overview
- Fix async list editor reset
- Redirect to /lists after deleting unpinned list
- Redirect to / after pinning a list

* Remove dead list columns when a list is deleted or fetch returns 404

Rename Activitypub to ActivityPub

* downgrade rubocop 0.48.1 => 0.46.0

* exclude vendor/**/* from rubocop target files

* add frozen_string_literal comment line

* fix percent literal delimited by ( and )

* fix alignment

* remove comment disabling unknown cop

* Begin coverage for account search service

* Coverage for hashtag query

* Coverage for calling local vs remote find based on domain presence

* Spec to check that exact matches are not duped

* Coverage of resolve option

* Coverage for account being provided

* Start to refactor account search service

* Isolate query username and domain methods

* Isolate exact_match method

* Extract methods for local and remote results

* Simplify local vs remote and account isoliation

* Extract methods for local and remote results

* Simplify de-dupe of exact match

* Simplify logic to check for non exact remotes

* Cache some methods

* Remove nil from exact_match from results array

* Return exact matches first

* Use find_remote even with no domain

Account.find_local is just an alias for Account.find_remote(user, nil) - so we
can not bother with the conditional here, and call find_remote directly.

Returns accounts, statuses, hashtags arrays

Add ability to search accounts by display name

overshadow requirement for remote-lookup

(without avatar). Also improved search position of exact matches