Update Win/Lose Overlay (mobile)

At the end of the match, user can minimize the overlay to see the last battlefield and browse other zones, to bring up the overlay, click game menu, and click Show WinLose Overlay.

Also fixes issue #928

forge-gui/src/main/java/forge/match/AbstractGuiGame.java

@@ -182,6 +182,9 @@ public abstract class AbstractGuiGame implements IGuiGame, IMayViewCards {
             return true; //if not in game, card can be shown
         }
         if(GuiBase.getInterface().isLibgdxPort()){
+            if(gameView.isGameOver()) {
+                return true;
+            }
             if(spectator!=null) { //workaround fix!! this is needed on above code or it will
                 gameControllers.remove(spectator); //bug the UI! remove spectator here since its must not be here...
                 return true;