Count of orgs and live services for platform admin

This makes it consistent that an option which contains more options has
a hint about how many options it contains.

Also adds a formatter to get us ready for 1,000 services 🎉

tests/app/main/views/accounts/test_choose_accounts.py

@@ -157,16 +157,21 @@ def test_choose_account_should_show_choose_accounts_page_if_no_services(
 def test_choose_account_should_should_organisations_link_for_platform_admin(
     client_request,
     platform_admin_user,
+    mock_get_organisations,
     mock_get_orgs_and_services,
     mock_get_organisation_services,
+    mock_get_service_and_organisation_counts,
 ):
     client_request.login(platform_admin_user)
 
     page = client_request.get('main.choose_account')
 
-    first_link = page.select_one('.browse-list-item a')
+    first_item = page.select_one('.browse-list-item')
+    first_link = first_item.select_one('a')
+    first_hint = first_item.select_one('.browse-list-hint')
     assert first_link.text == 'All organisations'
     assert first_link['href'] == url_for('main.organisations')
+    assert normalize_spaces(first_hint.text) == '3 organisations, 9,999 live services'
 
 
 def test_choose_account_should_show_back_to_service_link(

tests/app/main/views/test_index.py

@@ -34,7 +34,7 @@ def test_non_logged_in_user_can_see_homepage(
     assert normalize_spaces(page.select_one('#whos-using-notify').text) == (
         'Who’s using GOV.UK Notify '
         'Services '
-        '9999 services '
+        '9,999 services '
         'Organisations '
         '111 organisations '
         'See the list of services and organisations.'

tests/app/main/views/test_service_settings.py

@@ -3647,6 +3647,8 @@ def test_service_switch_can_upload_document_lets_contact_details_be_added_and_sh
 def test_archive_service_after_confirm(
     client_request,
     mocker,
+    mock_get_organisations,
+    mock_get_service_and_organisation_counts,
     mock_get_organisations_and_services_for_user,
     user,
     fake_uuid,