Make align to MiB the default setting instead of align to cylinder.

Migrate logic for alignment to cylinder into its own method
snap_to_cylinder, and place common logic in snap_to_alignment.

Add alignment checks for situations where space is needed for Master
Boot Record or Extended Boot Record.

Adjust ranges on spin buttons according to required boot record space.

Copy fix for off by one sector (#596552) from
Dialog_Partition_New::Get_New_Partition to
Dialog_Base_Partition::Get_New_Partition

Enhance resize / move logic for checking locations of nearby logical
partitions to not depend on the partition ordering.

Note: This commit does not include limiting graphic movement according
to required boot record space.