Safari fix finally underway

An official fix for the infamous Safari offset problem is now finally underway!

In the latest nightly build of Webkit, the 3d offset bug has been fixed. If you use the nightly build now, my current workarounds for the bug conflict with the official fix, so you will see an unused bar at the top of the display instead of at the bottom, but since SPi-V 1.3 is around the corner this should not prove too hard to fix.