Add titles to warning presets in admin UI (#13252)

db/migrate/20200312144258_add_title_to_account_warning_presets.rb

@@ -0,0 +1,15 @@
+require Rails.root.join('lib', 'mastodon', 'migration_helpers')
+
+class AddTitleToAccountWarningPresets < ActiveRecord::Migration[5.2]
+  include Mastodon::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    safety_assured { add_column_with_default :account_warning_presets, :title, :string, default: '', allow_null: false }
+  end
+
+  def down
+    remove_column :account_warning_presets, :title
+  end
+end