.deb packages open via zip file manager by default

@jesssullivan
This is what happens in UB 20.04 when I double click a JPEG file. On any consumer OS, the photo would be shown. I see some vague canvas, can’t even be sure it’s part of my photo. And there is nothing I can do here in this program, nothing obvious anyway, to show my photo. I have to know, I need to associate JPEG to a different program. But then I also have to know an alternative program exists.