Method deserialize

src/model/window-store.ts:16–26

(data: WindowStoreData)

  }

  deserialize(data: WindowStoreData) {
    if (typeof data != 'object')  // accepts empty data
      data = {};
    this.#windowStates = {};
    for (const id in data) {
      const wd = data[id];
      this.#windowStates[id] = wd.state;
      if (wd.opened)
        this.showWindow(id);
    }
  }

  serialize() {
    const data: WindowStoreData = {};