BUG: 399208
A workaround to the fact that on some hardware configurations with a wacom tablet (or, in general, an input device that generates a lot of events), okular accumulates several second of input latency
The timer is hardcoded to run at 60 fps, maybe that's not elegant
I see that there's similar functionality in a pair of other places, but I wasn't able to recycle the code efficiently
I tested this on a weak celeron n3450 laptop with no performance drawbacks
I don't notice any additional stuttering or lag on my powerful desktop