Implement highlight a duration when preview line changed #48

Job	Run time
test (ubuntu-latest, 26.3, false)	32s
test (ubuntu-latest, 27.2, false)	38s
test (ubuntu-latest, 28.2, false)	28s
test (ubuntu-latest, 29.2, false)	31s
test (macos-latest, 26.3, false)	1m 52s
test (macos-latest, 27.2, false)	2m 6s
test (macos-latest, 28.2, false)	2m 3s
test (macos-latest, 29.2, false)	1m 48s
test (windows-latest, 26.3, false)	2m 30s
test (windows-latest, 27.2, false)	1m 15s
test (windows-latest, 28.2, false)	50s
test (windows-latest, 29.2, false)	41s
test (ubuntu-latest, snapshot, true)	26s
test (macos-latest, snapshot, true)	1m 30s
test (windows-latest, snapshot, true)	49s
	17m 59s

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