Update poll questions translatable fields

We need to replace ".title=" by ".title_#{locale}=" in one place because
for some reason globalize builds a new translation record when using the
latter but it doesn't build one when using the former.

app/controllers/admin/poll/questions_controller.rb

@@ -56,8 +56,8 @@ class Admin::Poll::QuestionsController < Admin::Poll::BaseController
   private
 
     def question_params
-      attributes = [:poll_id, :title, :question, :proposal_id]
-      params.require(:poll_question).permit(*attributes, *translation_params(Poll::Question))
+      attributes = [:poll_id, :question, :proposal_id]
+      params.require(:poll_question).permit(*attributes, translation_params(Poll::Question))
     end
 
     def search_params