Show appropriate date when date is part of grouped data on chart. #744

Job	Run time
lint_and_docs (ubuntu-22.04, 3.9, 20.x)	9m 14s
build_js (ubuntu-22.04, 3.9, 20.x)	25m 50s
build_emscripten_wheel (ubuntu-22.04, x86_64, 3.9, 20.x)	17m 47s
build_and_test_rust (ubuntu-22.04, x86_64, 20.x, false)	10m 56s
build_python (ubuntu-22.04, x86_64, 3.9, 20.x, false)	17m 25s
test_python (ubuntu-22.04, x86_64, 3.9, 20.x, false)	1m 11s
build_and_test_jupyterlab (ubuntu-22.04, x86_64, 3.9, 20.x, false)	1m 37s
benchmark_js	0s
test_js (ubuntu-22.04, 3.9, 20.x)	5m 47s
benchmark_python	0s
test_python_sdist	0s
publish	0s
	1h 29m 47s

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