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/post_replacement.rb

@@ -89,7 +89,7 @@ class PostReplacement < ApplicationRecord
     end
 
     def search(params = {})
-      q = all
+      q = super
 
       if params[:creator_id].present?
         q = q.where(creator_id: params[:creator_id].split(",").map(&:to_i))
@@ -99,10 +99,6 @@ class PostReplacement < ApplicationRecord
         q = q.where(creator_id: User.name_to_id(params[:creator_name]))
       end
 
-      if params[:id].present?
-        q = q.where(id: params[:id].split(",").map(&:to_i))
-      end
-
       if params[:post_id].present?
         q = q.where(post_id: params[:post_id].split(",").map(&:to_i))
       end