Made popping upwards not the default. (Which is more sensible anyway)

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4481 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/mx/controls/CommandMenu.as

@@ -60,7 +60,7 @@ public class CommandMenu extends Menu
      * Actually pop up the menu. This can be used instead of show().
      */
     public function popUp (
-        trigger :DisplayObject, popUpwards :Boolean = true) :void
+        trigger :DisplayObject, popUpwards :Boolean = false) :void
     {
         var r :Rectangle = trigger.getBounds(trigger.stage);