Add search and sort functions to hashtag admin UI (#11829)

* Add search and sort functions to hashtag admin UI

* Move scope processing from tags_controller to tag_filter

* Fix based on method naming conventions

* Fixed not to get 500 errors for invalid requests

app/models/tag.rb

@@ -39,6 +39,7 @@ class Tag < ApplicationRecord
   scope :listable, -> { where(listable: [true, nil]) }
   scope :discoverable, -> { listable.joins(:account_tag_stat).where(AccountTagStat.arel_table[:accounts_count].gt(0)).order(Arel.sql('account_tag_stats.accounts_count desc')) }
   scope :most_used, ->(account) { joins(:statuses).where(statuses: { account: account }).group(:id).order(Arel.sql('count(*) desc')) }
+  scope :matches_name, ->(value) { where(arel_table[:name].matches("#{value}%")) }
 
   delegate :accounts_count,
            :accounts_count=,