adds featured proposals

via new action featured_vote
Featured proposals are never duplicated in the filtered lists
Featured are not calculated/shown in searches.

spec/support/common_actions.rb

@@ -161,4 +161,10 @@ module CommonActions
     expect(page).to have_selector('.in-favor a', visible: false)
   end
 
+  def create_featured_proposals
+    [create(:proposal, :with_confidence_score, cached_votes_up: 100),
+     create(:proposal, :with_confidence_score, cached_votes_up: 90),
+     create(:proposal, :with_confidence_score, cached_votes_up: 80)]
+  end
+
 end