allowe resetting individual y-axis for selected plot #471

Job	Run time
build-macos-brew-Qt6 (clang-9)	3m 36s
build-macos-no-brew-Qt6 (clang-9)	6m 7s
build-linux (gcc-9)	7m 1s
build-linux-Qt6 (gcc-9)	8m 27s
build-macos-brew (clang-9)	3m 54s
build-macos-no-brew (clang-9)	4m 49s
build-windows-mingw (5.15.*)	9m 43s
build-windows-mingw-Qt6 (6.3.0, qtmultimedia qt5compat)	11m 59s
build-windows-vs (5.15.*)	9m 3s
build-windows-vs-Qt6 (6.3.0, qtmultimedia qt5compat)	12m 0s
	1h 16m 39s

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