Update search system spec

Author: rossta

spec/system/searches_spec.rb

@@ -10,6 +10,14 @@
 
     fill_in :query, with: "Progressive Web Apps"
 
-    expect(page).to have_content("Progressive Web Apps on Rails Showcase")
+    within "dialog" do
+      expect(page).to have_content("Progressive Web Apps on Rails Showcase")
+    end
+
+    click_link "Progressive Web Apps on Rails Showcase"
+
+    within "main header" do
+      expect(page).to have_content("Progressive Web Apps on Rails Showcase")
+    end
   end
 end