This will allow to sue the AnimationEffect class for (temorarily) persistent changes like required by the translucency effect REVIEW: 109211
QElapsedTimer uses a monotic clock on all relevant systems and is thus invarant against date/time changes (while the bug was likely caused by daybreaks) BUG: 306186 REVIEW: 107250 FIXED-IN: 4.10 use monitc clock
REVIEW: 104898
REVIEW: 102922