Fwiw, new code should use Allman style for braces.
I also think it might be worth investigating to have this in win32u, for several reasons:
1) existing systray support is in the user drivers, it should even maybe be better to refactor existing systray to move more things into win32u and rework the interface to not require wine-specific PE exports.
2) everything that has to work with windows and icons is probably going to be easier to do in win32u.
3) having a dbus connection support in win32u might be useful for some other features.