[FIX] sale_product_matrix: ensure SO is saved

Manual action "click" was wrongly took off in
c650faaaf77fe99559a23a4d68fae56b498d8c89 and browser was sometimes
closed before the default click action ran. For clarity purpose, a step
is added to ensure the form is saved in place of the manual click.

closes odoo/odoo#100725

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

addons/sale_product_matrix/static/tests/tours/sale_product_matrix_tour.js

@@ -122,6 +122,9 @@ tour.register('sale_matrix_tour', {
     extra_trigger: '.oe_subtotal_footer_separator:contains("65.32")',
 }, {
     trigger: '.o_form_button_save:contains("Save")',
+}, {
+    trigger: '.o_form_button_edit:contains("Edit")',
+    run: function () {},  // Ensure the form is saved before closing the browser
 },
 ]);