Fixes #222

Community view shows the polls for the given proposal.

app/models/proposal.rb

@@ -33,6 +33,7 @@ class Proposal < ActiveRecord::Base
   has_many :proposal_notifications, dependent: :destroy
   has_many :proposal_executed_dashboard_actions, dependent: :destroy
   has_many :proposal_dashboard_actions, through: :proposal_executed_dashboard_actions
+  has_many :polls, as: :related
 
   validates :title, presence: true
   validates :question, presence: true