[WriteLog] Suggestion - Both distance units better than just one

[Rick Tavan N6XI]

Here's a tiny feature improvement that would be a big help from time to
time: Instead of specifying either miles or km in the Great Circle
Properties dialog, why not display them both all the time? There is plenty
of room, even in a small Great Circle Window because the Reverse Bearing
label requires enough horizontal space that Distance <miles>/<km> would fit
easily.

/Rick N6XI