During packing, some combinations of `Fraction` margin method, and
various locking options, interact with situations where all or none
of the islands are pinned.
Previously, the settings were queried to choose the best packing method.
Now, the islands themselves are queried if they can translate or scale,
and the packing method is chosen based on the input, rather than the
parameters.
Fixes unreported crash with "Locked Position" when all islands are pinned.
Reported as #108037 "3. In some case locked position is not respected"
96101a66fc