Fix repeat on hold for toolbar buttons. At some point the initial event's target is nulled out. No idea what is doing it but the fix is to clone the event before starting the repeat processing.
Change the repeat thresholds to try to make it perform better on devices. It used to accelerate nicely but not any longer. It's functional as-is (although managing a hold on a touch device is not simple...) but not as slick as it used to be.