Implements graph for dashboard

Implements graph secion for dashboard.

Dashboard related actions have been agrupated inside a menu in the admin
section.

Minor bugfixes.

spec/features/moderation/administrator_tasks_spec.rb

@@ -1,74 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe 'Administrator tasks moderation' do
-  let(:moderator) { create(:moderator) }
-
-  before do
-    login_as moderator.user
-  end
-
-  context 'when accessing the pending task list' do
-    context 'and no pending task' do
-      before do
-        visit moderation_administrator_tasks_path
-      end
-
-      it 'informs that there are no pending tasks' do
-        expect(page).to have_content('There are no pending tasks')
-      end
-    end
-
-    context 'and there are pending tasks' do
-      let!(:task) { create :administrator_task, :pending }
-
-      before do
-        visit moderation_administrator_tasks_path
-      end
-
-      it 'shows the related proposal title' do
-        expect(page).to have_content(task.source.proposal.title)
-      end
-
-      it 'shows the requested action title' do
-        expect(page).to have_content(task.source.proposal_dashboard_action.title)
-      end
-
-      it 'has a link that allows solving the request' do
-        expect(page).to have_link('Solve')
-      end
-    end
-  end
-
-  context 'when solving a pending task' do
-    let!(:task) { create :administrator_task, :pending }
-
-    before do
-      visit moderation_administrator_tasks_path
-      click_link 'Solve'
-    end
-
-    it 'contains a link to the proposal' do
-      expect(page).to have_link('Check the proposal details')
-    end
-
-    it 'contains a button that solves the request' do
-      expect(page).to have_button('Mark as solved')
-    end
-
-    it 'shows the comments added by the user during the request' do
-      expect(page).to have_content(task.source.comments)
-    end
-
-    context 'and the Mark as solved button is pressed' do
-      before do
-        click_button 'Mark as solved'
-      end
-
-      it 'The proposal dissapears from the list' do
-        expect(page).not_to have_content(task.source.proposal.title)
-      end
-    end
-  end
-end