FR: Add ability to change the "reset zoom" binding

[david-macmahon]

MacOS seems quite adamant about claiming “Ctrl+Left Click” for “Right Click” and I can’t find any way to alter that, so if I lose my place when zooming I have no (easy) way to get back to the starting position. It would be great if the "reset zoom" binding could be changed to something else. Apparently it is adjustable for PolarAxis already, so maybe that could be copied more broadly.