Properly check that issue list has persisted

A valid user needs to be signed in, and we need to reload the page to
verify that the issue list was saved on the backend.

spec/features/groups/issues_spec.rb

@@ -102,10 +102,16 @@ describe 'Group issues page' do
   end
 
   context 'manual ordering' do
+    let(:user_in_group) { create(:group_member, :maintainer, user: create(:user), group: group ).user }
+
     let!(:issue1) { create(:issue, project: project, title: 'Issue #1', relative_position: 1) }
     let!(:issue2) { create(:issue, project: project, title: 'Issue #2', relative_position: 2) }
     let!(:issue3) { create(:issue, project: project, title: 'Issue #3', relative_position: 3) }
 
+    before do
+      sign_in(user_in_group)
+    end
+
     it 'displays all issues' do
       visit issues_group_path(group, sort: 'relative_position')
 
@@ -135,6 +141,16 @@ describe 'Group issues page' do
         from_index: 0,
         to_index: 2)
 
+      wait_for_requests
+
+      check_issue_order
+
+      visit issues_group_path(group, sort: 'relative_position')
+
+      check_issue_order
+    end
+
+    def check_issue_order
       page.within('.manual-ordering') do
         expect(find('.issue:nth-child(1) .title')).to have_content('Issue #2')
         expect(find('.issue:nth-child(2) .title')).to have_content('Issue #3')