Restart game - update ability executor to work correctly with async inputs.

src/main/java/forge/card/ability/effects/RestartGameEffect.java

@@ -49,6 +49,8 @@ public class RestartGameEffect extends SpellAbilityEffect {
         }
 
         GameNew.restartGame(game.getMatch(), game, sa.getActivatingPlayer(), playerLibraries);
+        game.getMatch().getInput().lock(); // restore the 'locked' state of the input, 
+        // because the caller method (invokeInNewThread) will try to unlock input. Restart has removed that input state.
     }
 
     /* (non-Javadoc)