Correct y limits in ProfileViewerState when min same as max #763

Job	Run time
initial_checks / Load tox environments	6s
initial_checks / codestyle (ubuntu-latest)	22s
tests / Load tox environments	7s
tests / py38-test-lts-all (ubuntu-latest)	1m 44s
tests / py39-test (ubuntu-latest)	1m 31s
tests / py310-test-all (ubuntu-latest)	1m 46s
tests / py311-test (ubuntu-latest)	1m 32s
tests / py312-test-all (ubuntu-latest)	2m 28s
tests / py38-docs (ubuntu-latest)	4m 14s
tests / py311-docs (macos-latest)	1m 52s
tests / py38-test-all (macos-12)	2m 54s
tests / py39-test (macos-12)	2m 40s
tests / py310-test-all (macos-latest)	1m 24s
tests / py311-test (macos-latest)	1m 23s
tests / py312-test-all (macos-latest)	1m 29s
tests / py38-test (windows-latest)	2m 40s
tests / py39-test (windows-latest)	2m 41s
tests / py310-test-dev-all (ubuntu-latest)	3m 1s
tests / py311-test-dev (ubuntu-latest)	2m 10s
tests / py312-test-dev-all (ubuntu-latest)	2m 41s
tests / py311-test-dev-all (macos-latest)	2m 2s
tests / py312-test-dev (macos-latest)	1m 55s
tests / py310-test-dev (windows-latest)	5m 23s
publish / Build source and wheel distribution	2m 46s
	50m 51s

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