Method resume

MCSL2Lib/ProgramControllers/downloadController.py:235–238

恢复下载 - pypdl 支持断点续传，重新start即可

(self)

            self.downloader.stop()

    def resume(self):
        """恢复下载 - pypdl 支持断点续传，重新start即可"""
        if self.downloader:
            self.start_download()

    def cancel(self):
        """取消下载"""