Implements #150

Adds an entry inside moderation section that allows moderators to check
pending tasks and mark them as solved.

spec/models/proposal_executed_dashboard_action_spec.rb

@@ -6,12 +6,17 @@ describe ProposalExecutedDashboardAction do
     build :proposal_executed_dashboard_action, 
           proposal: proposal,
           proposal_dashboard_action: proposal_dashboard_action,
-          executed_at: executed_at
+          executed_at: executed_at,
+          comments: comments
   end
 
   let(:proposal) { create :proposal }
-  let(:proposal_dashboard_action) { create :proposal_dashboard_action }
+  let(:proposal_dashboard_action) do 
+    create :proposal_dashboard_action, request_to_administrators: request_to_administrators, link: Faker::Internet.url
+  end
+  let(:request_to_administrators) { false }
   let(:executed_at) { Time.now }
+  let(:comments) { '' }
 
   it { is_expected.to be_valid }
 
@@ -33,6 +38,22 @@ describe ProposalExecutedDashboardAction do
     it { is_expected.not_to be_valid }
   end
 
+  context 'when the action sends a request to the administrators' do
+    let(:request_to_administrators) { true }
+
+    context 'and comments are blank' do
+      let(:comments) { '' }
+
+      it { is_expected.not_to be_valid }
+    end
+
+    context 'and comments have value' do
+      let(:comments) { Faker::Lorem.sentence }
+
+      it { is_expected.to be_valid }
+    end
+  end
+
   context 'when it has been already executed' do
     let!(:executed) { create(:proposal_executed_dashboard_action, proposal: proposal, proposal_dashboard_action: proposal_dashboard_action) }