Move all of Bubble's searchable concerns into Searchable

app/models/bubble.rb

@@ -1,5 +1,4 @@
 class Bubble < ApplicationRecord
-  include ::Searchable
   include Assignable, Boostable, Colored, Commentable, Eventable, Poppable, Searchable, Taggable, Threaded
 
   belongs_to :bucket
@@ -7,8 +6,6 @@ class Bubble < ApplicationRecord
 
   has_one_attached :image, dependent: :purge_later
 
-  searchable_by :title, using: :bubbles_search_index
-
   before_save :set_default_title
 
   scope :reverse_chronologically, -> { order created_at: :desc, id: :desc }

app/models/bubble/searchable.rb

@@ -2,13 +2,15 @@ module Bubble::Searchable
   extend ActiveSupport::Concern
 
   included do
+    include ::Searchable
+
+    searchable_by :title, using: :bubbles_search_index
+
     scope :mentioning, ->(query) do
       bubbles = search(query).select(:id).to_sql
       comments = Comment.search(query).select(:bubble_id).to_sql
 
-      left_joins(:comments)
-        .where("bubbles.id in (#{bubbles}) or comments.bubble_id in (#{comments})")
-        .distinct
+      left_joins(:comments).where("bubbles.id in (#{bubbles}) or comments.bubble_id in (#{comments})").distinct
     end
   end
 end