Small change to the Party Menu interface

[CountArtha]

When moving troops between a garrison and the party, the player can either press CTRL+LEFT MOUSE to move every unit of a certain type or click them individually.  It doesn't take too long, but it's awfully tedious for me to click the left mouse button twenty or forty or eighty times to get my army out of its castle.

Would it be terribly difficult to tweak the interface so that SHIFT+LEFT MOUSE moves ten units at a time?

Thank you in advance.