GUI, game: introduced sizeable hand/stack zones (part of #6887 and #969):

- added splitter/divider between hand and stack zone;
- users can resize it by mouse drag;
- users can hide/minimize hand or stack zones by mouse clicks on splitter arrows;
- splitter settings shared between games and stored between app runs;

Mage.Client/src/main/java/mage/client/MageFrame.java

@@ -730,8 +730,6 @@ public class MageFrame extends javax.swing.JFrame implements MageClient {
             return;
         }
 
-        LOGGER.debug("Setting " + frame.getTitle() + " active");
-
         activeFrame = frame;
         desktopPane.moveToFront(activeFrame);
         activeFrame.setBounds(0, 0, desktopPane.getWidth(), desktopPane.getHeight());