The general functionality of using Ctrl or Alt to modify the increments in the following topic:
Note that you mention shift, but that does not affect the increment.
Yes, it also works in many PropertyManagers. It works in the Extrude PropertyManager that you showed. Did you try it?
It does not work in ALL PropertyManagers in the system yet. However, the places where it is enabled are the most common ones and the same ones where it is possible to create equations directly in the PropertyManager. Which PropertyManagers have this functionality are documented here:
I hope this helps,
Thank you, Jim!
thank you for links!