bugfix - 全局键盘监听清理

src/jlgraphic/plugins/KeyboardPlugin.ts

@@ -112,6 +112,7 @@ export class JlGraphicAppKeyboardPlugin {
       document.removeEventListener('mousedown', onMouseUpdateTarget, false);
       document.removeEventListener('keydown', keydownHandle, false);
       document.removeEventListener('keyup', keyupHandle, false);
+      GlobalKeyboardPlugin.removeGAKPlugin(this);
     });
   }