Show Undo in prompt if last action is undoable

Clean up unnecessary items from Game menu

forge-gui-desktop/src/main/java/forge/screens/match/CMatchUI.java

@@ -21,7 +21,6 @@ import com.google.common.collect.Lists;
 import com.google.common.eventbus.EventBus;
 import com.google.common.eventbus.Subscribe;
 
-import forge.GuiBase;
 import forge.LobbyPlayer;
 import forge.UiCommand;
 import forge.FThreads;
@@ -31,7 +30,6 @@ import forge.events.IUiEventVisitor;
 import forge.events.UiEvent;
 import forge.events.UiEventAttackerDeclared;
 import forge.events.UiEventBlockerAssigned;
-import forge.game.Game;
 import forge.game.GameEntity;
 import forge.game.card.Card;
 import forge.game.combat.Combat;
@@ -477,15 +475,6 @@ public enum CMatchUI implements ICDoc, IMenuProvider {
         }
         return panels;
     }
-    
-    /** Undo last game action if possible. */
-    public void undo() {
-    	Game game = Singletons.getControl().getObservedGame();
-        Player player = game.getPhaseHandler().getPriorityPlayer();
-        if (player != null && player.getLobbyPlayer() == GuiBase.getInterface().getGuiPlayer()) {
-            game.stack.undo();
-        }
-    }
 
     /** Concede game, bring up WinLose UI. */
     public void concede() {

forge-gui-desktop/src/main/java/forge/screens/match/menus/GameMenu.java

@@ -1,6 +1,7 @@
 package forge.screens.match.menus;
 
 import forge.assets.FSkinProp;
+import forge.match.MatchUtil;
 import forge.menus.MenuUtil;
 import forge.model.FModel;
 import forge.properties.ForgePreferences;
@@ -75,7 +76,7 @@ public final class GameMenu {
         return new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
-                CMatchUI.SINGLETON_INSTANCE.undo();
+                MatchUtil.undoLastAction();
             }
         };
     }