give an option for a toggle button on graphs to change y-axis min/max… #676

Job	Run time
build-macos-brew-Qt6 (clang-9)	2m 6s
build-macos-brew (clang-9)	1m 48s
build-macos-no-brew (clang-9)	52s
build-macos-no-brew-Qt6 (clang-9)	57s
build-linux (gcc-9)	6m 39s
build-linux-Qt6 (gcc-9)	7m 2s
build-windows-mingw (5.15.2)	1m 52s
build-windows-mingw-Qt6 (6.3.0, qtmultimedia qt5compat)	7m 44s
build-windows-vs (5.15.2)	7m 25s
build-windows-vs-Qt6 (6.3.0, qtmultimedia qt5compat)	12m 38s
	49m 3s

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