Move owl ungrab code into its own function #992

Job	Run time
clickable (Debug, amd64, glew)	17m 2s
clickable (Debug, amd64, sdl)	16m 8s
clickable (Debug, armhf, glew)	19m 31s
clickable (Debug, armhf, sdl)	16m 38s
clickable (Release, amd64, glew)	17m 44s
clickable (Release, amd64, sdl)	16m 49s
clickable (Release, arm64, glew)	16m 48s
clickable (Release, arm64, sdl)	18m 53s
clickable (Release, armhf, glew)	16m 59s
clickable (Release, armhf, sdl)	15m 43s
	2h 52m 15s

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