disable clear button on game finished

client/src/components/game.ctrl.btns.jsx

@@ -98,7 +98,7 @@ function GameCtrlBtns(args) {
     return (
         <div class="game-ctrl-btns">
             <button disabled={!account.subscribed} onClick={() => setChatShow(!chatShow)}>Chat</button>
-            <button disabled={animating} onClick={sendGameSkillClear}>Clear</button>
+            <button disabled={finished || animating} onClick={sendGameSkillClear}>Clear</button>
             {finished ? quitBtn : readyBtn}
         </div>
     );