Add a "refresh button"

[NawfelBgh]

which fetches the newest news with hyper

[mmstick]

I must admit that I've been attempting to get this sort of functionality in both this and my Systemd Manager GUI but haven't quite figured out how to go about doing that. If you or anyone else can figure it out, that would be great. I'm trying to communicate with upstream gtk-rs developers to get them to chime in on what I'm doing wrong in the meantime.