Fix kwindowinfox11test
Qt sets the desktop file property on windows since Qt 6.6.1 qtbase commit 51129d65b931a0a5dd235f7df26a1fe9f421ad26
Qt sets the desktop file property on windows since Qt 6.6.1 qtbase commit 51129d65b931a0a5dd235f7df26a1fe9f421ad26