Make account recommendations spec more robust

We check the changes have been saved and we check recommendations have
been disabled after visiting the debates and proposals pages. The
latter helps us avoid accessing the database after the process running
the browser has been started.

spec/system/account_spec.rb

@@ -198,13 +198,18 @@ describe "Account" do
 
       click_button "Save changes"
 
+      expect(page).to have_content "Changes saved"
+
       expect(find("#account_recommended_debates")).not_to be_checked
       expect(find("#account_recommended_proposals")).not_to be_checked
 
-      user.reload
+      visit debates_path
 
-      expect(user.recommended_debates).to be(false)
-      expect(user.recommended_proposals).to be(false)
+      expect(page).not_to have_link("recommendations")
+
+      visit proposals_path
+
+      expect(page).not_to have_link("recommendations")
     end
   end
 end