By default, dialogs are hidden in tests, s.t. we don't see them flicker when running the test suite. There is a css rule to hide them, only if there's no "debug" classname on the body. This commit toggles this classname when a test is run with QUnit.debug. closes odoo/odoo#84694 Signed-off-by: Mathieu Duckerts-Antoine <dam@odoo.com>