Enh sensitivity UI change (#278) #1491

Job	Run time
pytest matrix / ubuntu / MNE main	10m 14s
pytest matrix / ubuntu / MNE maint/1.7	10m 32s
PyQt5 / ubuntu	2m 51s
pytest matrix / windows / MNE main	9m 33s
PyQt6 / ubuntu	10m 4s
pytest matrix / windows / MNE maint/1.7	10m 31s
PySide6 / ubuntu	10m 39s
pytest matrix / macos / MNE main	5m 36s
pytest matrix / macos / MNE maint/1.7	4m 52s
PySide6 / macos	13m 39s
PySide6 / windows	11m 0s
pytest no opengl / ubuntu / MNE main	8m 36s
pytest no opengl / ubuntu / MNE maint/1.7	8m 48s
pytest old / ubuntu / MNE maint/1.5	10m 11s
pytest pip-pre / ubuntu / MNE main	10m 31s
	2h 17m 37s

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