Fixed default group sort option

Closes #38808

app/controllers/dashboard/groups_controller.rb

@@ -1,6 +1,6 @@
 class Dashboard::GroupsController < Dashboard::ApplicationController
   def index
-    @sort = params[:sort] || 'id_desc'
+    @sort = params[:sort] || 'created_desc'
 
     @groups =
       if params[:parent_id] && Group.supports_nested_groups?

changelogs/unreleased/group-sort-dropdown-blank.yml

@@ -0,0 +1,5 @@
+---
+title: Fixed group sort dropdown defaulting to empty
+merge_request:
+author:
+type: fixed

spec/features/dashboard/group_spec.rb

@@ -5,6 +5,12 @@ RSpec.describe 'Dashboard Group' do
     sign_in(create(:user))
   end
 
+  it 'defaults sort dropdown to last created' do
+    visit dashboard_groups_path
+
+    expect(page).to have_button('Last created')
+  end
+
   it 'creates new group', js: true do
     visit dashboard_groups_path
     find('.btn-new').trigger('click')