Ziping Sun

@oknozor I did some investigation, and found some systray implementations leverage [libdbusmenu](https://github.com/AyatanaIndicators/libdbusmenu). It seems there is no existing Rust binding for `libdbusmenu`. For those why are trying `libdbusmenu`, see [gtk-rs/gir](https://github.com/gtk-rs/gir)...