effect/offscreenquickview: update scene graph timers when window refreshed
Credit: https://bugs.kde.org/show_bug.cgi?id=485927#c51
This additional animation timer refresh resolves the parent bug, where QtQuick effects are unable to consistently run over 60hz/fps. Overview and co now run at consistent steady 144hz on X11 and Wayland.
Refer to linked bug thread for notes from the patch author.
Edited by Blazer Silving