Enable multi-level nav in the left nav bar #3350

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	11m 34s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	15m 36s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	15m 34s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	15m 32s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	15m 32s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	15m 33s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	15m 30s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	11m 48s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	13m 22s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	14m 23s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	14m 27s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	15m 32s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	15m 34s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	15m 30s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	15m 31s
pytorch_tutorial_build_manager	1s
	3h 40m 59s

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