How do you move an existing command group (army leader and his assigned troops) from one theater to another?
(Selecting a general and choosing New Theater puts him into the new theater. How does a second general get there? Left- or right-click and drag between the theater docks doesn't work, and I didn't see a button anywhere on the leader dialog to set their theater. Is there a better way to do it than (a) remove the leader; (b) choose the destination theater; (c) reform the command group with the leader in the new theater? Removing the leader is problematic as it disrupts planning and orders. It should be possible just to reorg an existing set of generals from, say, everyone in "Europe" to some in "Germany" and some in "Mediterranean" without stopping ongoing operations or re-selecting units. But I haven't found that UI quirk to reshuffle who's in which dock.)