Revert "ui.backend.cocoa.views: make compatible with 10.6."
Revert "ui.backend.cocoa.views: make compatible with 10.6."

This reverts commit 7f6f742fc3f2c295d18dbca1f8cba42cc22f58d0.

mrjbq7/factor,bpollack/factor,AlexIljin/factor,dch/factor,mrjbq7/factor,bjourne/factor,tgunr/factor,nicolas-p/factor,sarvex/factor-lang,bpollack/factor,AlexIljin/factor,tgunr/factor,nicolas-p/factor,dch/factor,sarvex/factor-lang,bjourne/factor,dch/factor,factor/factor,slavapestov/factor,slavapestov/factor,AlexIljin/factor,factor/factor,bpollack/factor,dch/factor,mrjbq7/factor,bjourne/factor,nicolas-p/factor,bpollack/factor,bpollack/factor,slavapestov/factor,dch/factor,bjourne/factor,nicolas-p/factor,slavapestov/factor,tgunr/factor,slavapestov/factor,mrjbq7/factor,bpollack/factor,slavapestov/factor,bjourne/factor,nicolas-p/factor,AlexIljin/factor,nicolas-p/factor,tgunr/factor,tgunr/factor,factor/factor,factor/factor,mrjbq7/factor,sarvex/factor-lang,sarvex/factor-lang,bjourne/factor,AlexIljin/factor,tgunr/factor,dch/factor,sarvex/factor-lang,factor/factor,factor/factor,AlexIljin/factor,bpollack/factor,nicolas-p/factor,mrjbq7/factor,sarvex/factor-lang,sarvex/factor-lang,AlexIljin/factor,slavapestov/factor,bjourne/factor