Fix khintssettings_unittest for Plasma 6 & adjust broken Qt6 QML tests
Single click to select is no longer the default.
Adjust Qt6 QML tests as per what I found on https://doc.qt.io/qt-6/qml-qtquick-dialogs-filedialog.html; they still don't pass for me locally but perhaps they do for someone now that they're not definitely wrong and emitting errors such as the following?
file:///.../qt6/autotests/qml/filedialog_parentless.qml:8:1: module "QtQuick.Dialogs" version 1.0 is not installed
.../qt6/autotests/tst_filedialog.qml:3,1: module "QtQuick.Dialogs" version 1.2 is not installed
.../qt6/autotests/tst_filedialog.qml:14,9: Cannot assign to non-existent property "folder"
Edited by Jami Kettunen