Fix #3430: Accept the search[id] param in all controllers.

* Allow every controller to take the `search[id]` param.

* Parse the `search[id]` param the same way that the `id:<N>` metatag is
  parsed. So `search[id]=1,2,3`, `search[id]=<42`, `search[id]=1..10`, for
  example, are all accepted.

app/models/pool.rb

@@ -50,17 +50,13 @@ class Pool < ApplicationRecord
     end
 
     def search(params)
-      q = where("true")
+      q = super
       params = {} if params.blank?
 
       if params[:name_matches].present?
         q = q.name_matches(params[:name_matches])
       end
 
-      if params[:id].present?
-        q = q.where("pools.id in (?)", params[:id].split(","))
-      end
-
       if params[:description_matches].present?
         q = q.where("lower(pools.description) like ? escape E'\\\\'", "%" + params[:description_matches].mb_chars.downcase.to_escaped_for_sql_like + "%")
       end