Blender Git Loki

Fix T88386: Continuous Grab occasionally jumping on Arm64 MacOS

During the processing of a continuous drag event, other mouse move
events may be in the queue waiting to be processed.

But when a mouse wrapping happens, these waiting mouse move events
become out of date as they report a mouse position prior to wrapping.

The current code ignores these events by comparing their `timestamp` to
the time recorded in the last mouse wrapping.

The bug happens because the computed value in
`mach_absolute_time() * 1e-9` for some reason is incompatible with the
value of `[event timestamp]`.

Since macOS 10.6, we have a new way to get the amount of time the
system has been awake. `[[NSProcessInfo processInfo] systemUptime]`.

Using this updated method fixed the problem.

Differential Revision: https://developer.blender.org/D12202