Since the module loader rewrite, it now reports errors directly in the
DOM. The error alert also has the class "modal" so that in case a tour
comes accross a page with module loading errors, it will only look for
elements inside it and fail. But in the QUnit test suite, modals are
invisible by default, causing the page to be blank in those cases.
This commit adds a css rule to make sure that this error alert is shown,
and updates the code that was previously used to report these errors in
the qunit suite to instead simply check for errors reported by the
module loader.
closesodoo/odoo#143589
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>