Less strick check

Do not ask the user to select a product when the product selection
is hidden because there is only one product.

src/lib/installation/clients/inst_complex_welcome.rb

@@ -194,7 +194,7 @@ def license_confirmation_required?
     # @return [Boolean] true if a product has been selected and license
     # agreement confirmed when required; false otherwise
     def product_selection_finished?
-      if selected_product.nil?
+      if selected_product.nil? && products.size > 1
         Yast::Popup.Error(_("Please select a product to install."))
         return false
       elsif license_confirmation_required? && !selected_product.license_confirmed?