Fix test failure when D11569 lands

Summary:
After D11569 lands, the konqpopupmenutest test fails. This patch fixes it.

Depends on D11569

Test Plan:

• Deploy KIO with D11569
• make && ctest -R konqpopupmenutest (it fails)
• Deploy this patch
• make && ctest -R konqpopupmenutest (it passes)

Reviewers: Konqueror, dfaure

Reviewed By: Konqueror, dfaure

Differential Revision: https://phabricator.kde.org/D11836