A few suggestions for improvement the app

Hello.
First of all, I want to thank you very much for such a convenient, free and cross-platform product. I am happy to use it on Windows and mac OS.

I have some suggestions for improving the program and I also noticed some bugs. I hope you have time to add these features.

Suggestions for new functionality:
1. Add the function of turning off the computer after all downloads are completed.
2. Add the ability to see the full link (and the ability to copy it) on which the file will be downloaded before you can confirm the start of the download.
3. Add the ability to mirror download, that is, download a file from several links (this function is available in Download Manager on Windows).
4. Add the function "Open the file immediately after downloading".
5. Add a warning before downloading that such a file already exists and a field for renaming the downloaded file.

Bugs:
1. On Mac, it is impossible to close the window by Command+W, you can only complete the application on Command+Q
2. There is no way to rehash the distribution if you add a torrent, some of the files of which have already been downloaded (absolutely all files from the torrent start downloading first)