Currently, the limitShift function considers two types of "offsets" when computing the min/max limits for the shift middleware:

• the offset from the offset middleware (added
• the offset from the offset option (part of the limitShift arguments)

Both of these offsets are added arbitrarily, following a logic that depends on the axis and the popover's placement.

This logic comes as a limitation when the consumer of the library needs to add an offset to the popover that is always applied. In that case.

That's why I'm proposing that we add a new option for the limitShift function, in order to be able to pass an offset amount that gets always added when computing the min/max limits — not sure what the best name for this option would be.

For more context, see the conversation in #1868