macOS [Reg 5.7.1->5.8-beta] Widget focus rectangle not drawn properly

Steps to reproduce the issue.

1. Launch Qt styles example (examples/widgets/widgets/styles)
2. Cycle the focus between different widgets

Expected outcome:
Focused widgets are having focus rectangle around them

Actual outcome:
Focus rectangle is drawn only on the top left corner of the widget

Notes:
Tested on macOS Sierra with Retina display