ksplashqml: Set cursor shape per window
At the moment, the cursor is not hidden on wayland because there's an issue in qtwayland qpa related to handling of QGuiApplication::overrideCursor() which I plan to fix.
On the other hand, it would be nicer to use a more declarative way to manage the cursor, i.e. set the cursor shape for each individual window and let Qt take care of the rest rather than use ugly QGuiApplication::setOverrideCursor().