Suggestion: Add the ability to shift-click move on the world map

[ReptilePZ]

As the title says, it'd be nice to have the ability to shift-click move on the world map. The original game had this, battle scenarios have it, and, given that wandering into enemy territory results in a drop in relations with that kingdom, it'd be good to have the option to determine a marshal's path more preciesly without the need to babysit them and potentially forget that they're stood in the middle of the ocean, draining supplies and awaiting your next move command just because their default pathing took them marching through the heart of Europe and dozens of kingdoms.