Fixed #239

Proposals dashboard refactored to dashboard.
Added missing specs for the dashboard.

spec/models/link_spec.rb

@@ -3,13 +3,13 @@ require 'rails_helper'
 describe Link do
   subject do 
     build :link,
-          linkable: proposal_dashboard_action, 
+          linkable: dashboard_action, 
           label: label,
           url: url,
           open_in_new_tab: true 
   end
 
-  let(:proposal_dashboard_action) { build :proposal_dashboard_action }
+  let(:dashboard_action) { build :dashboard_action }
   let(:label) { Faker::Lorem.sentence }
   let(:url) { Faker::Internet.url }