Allow for control of Tux's fancy idle animations via scripting #2665

Job	Run time
clickable (Debug, amd64, glew)	11m 42s
clickable (Debug, amd64, sdl)	11m 15s
clickable (Debug, armhf, glew)	11m 11s
clickable (Debug, armhf, sdl)	10m 35s
clickable (Release, amd64, glew)	11m 14s
clickable (Release, amd64, sdl)	10m 54s
clickable (Release, arm64, glew)	11m 30s
clickable (Release, arm64, sdl)	11m 34s
clickable (Release, armhf, glew)	10m 12s
clickable (Release, armhf, sdl)	10m 6s
	1h 50m 13s

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