Sort measures by the highest score to lowest score [finishes #179726949]

spec/features/school_dashboard_feature_spec.rb

@@ -69,6 +69,11 @@ feature 'School dashboard', type: feature do
     expect(problem_solving_emphasis_row['x']).to eq '0.0%'
 
     page.assert_selector('.measure-row-bar', count: Measure.count)
+    professional_qualifications_row_index = measure_row_bars.find_index { |item| item['data-for-measure-id'] == '1A-i' }
+    student_physical_safety_row_index = measure_row_bars.find_index { |item| item['data-for-measure-id'] == '2A-i' }
+    problem_solving_emphasis_row_index = measure_row_bars.find_index { |item| item['data-for-measure-id'] == '4C-i' }
+    expect(student_physical_safety_row_index).to be < professional_qualifications_row_index
+    expect(professional_qualifications_row_index).to be < problem_solving_emphasis_row_index
   end
 
   let(:username) { 'winchester' }

spec/presenters/measure_graph_row_presenter_spec.rb

@@ -122,4 +122,24 @@ RSpec.describe MeasureGraphRowPresenter do
       end
     end
   end
+
+  context 'sorting scores' do
+    it 'selects a shorter bar width before a longer bar' do
+      this_presenter = MeasureGraphRowPresenter.new measure: measure, score: 3.7
+      other_presenter = MeasureGraphRowPresenter.new measure: measure, score: 4.4
+      expect(this_presenter <=> other_presenter).to be < 0
+    end
+
+    it 'selects a warning bar before a ideal bar' do
+      this_presenter = MeasureGraphRowPresenter.new measure: measure, score: 1.0
+      other_presenter = MeasureGraphRowPresenter.new measure: measure, score: 5.0
+      expect(this_presenter <=> other_presenter).to be < 0
+    end
+
+    it 'selects an ideal bar after a warning bar' do
+      this_presenter = MeasureGraphRowPresenter.new measure: measure, score: 4.4
+      other_presenter = MeasureGraphRowPresenter.new measure: measure, score: 1.0
+      expect(this_presenter <=> other_presenter).to be > 0
+    end
+  end
 end