Set help-echo property. #231

Job	Run time
build (ubuntu-latest, 27.2, false)	1m 52s
build (ubuntu-latest, 28.2, false)	1m 41s
build (ubuntu-latest, 29.1, false)	1m 48s
build (macos-latest, 27.2, false)	3m 5s
build (macos-latest, 28.2, false)	3m 45s
build (macos-latest, 29.1, false)	3m 31s
build (windows-latest, 27.2, false)	3m 26s
build (windows-latest, 28.2, false)	2m 23s
build (windows-latest, 29.1, false)	2m 15s
build (ubuntu-latest, snapshot, true)	1m 18s
build (macos-latest, snapshot, true)	4m 59s
build (windows-latest, snapshot, true)	1m 26s
	31m 29s

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