Change the playlist download file name from "music.zip" to s.th. more obvious

[6arms1leg]

I know this is merely a detail, but it's bugging me and I often see users getting confused about it:

Can we change the name of the playlist download file from "music.zip" to something more obvious, e.g. "CherryMusic_DL.zip" or even preferable the name of the playlist? From my experience, many not so technically adept users end up searching for their CherryMusic download on their totally overcrowded Windows desktop, not finding it because of its generic name. I think that would further improve the user experience, no? To be even more picky, not all audio files are music (e.g. audiobooks, podcasts, etc.)... :monkey_face:

[devsnd]

This is halfway fixed by #679, but giving the Zip file the name of the playlist or a more informative title like CherryMusic 22 tracks (80mins).zip still stands out.