snake-game.ui: load game textures in graft, dispose in ungraft.
snake-game.ui: load game textures in graft, dispose in ungraft.

Use find-gl-context to fix dispose bug that was corrupting UI on macOS.

bpollack/factor,AlexIljin/factor,bpollack/factor,AlexIljin/factor,mrjbq7/factor,AlexIljin/factor,factor/factor,tgunr/factor,mrjbq7/factor,tgunr/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,factor/factor,bpollack/factor,AlexIljin/factor,tgunr/factor,factor/factor,AlexIljin/factor,bpollack/factor,tgunr/factor,mrjbq7/factor,mrjbq7/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,AlexIljin/factor,bpollack/factor,factor/factor,tgunr/factor,factor/factor,tgunr/factor