Paul

@szaydel testing is good for stuff under tests :) it seems as though perhaps `SavePlot()` isn't under test? My first thought would be to use [afero](https://github.com/spf13/afero) as a fake file...

This PR made a big difference for me running on Windows 10 - exif-tool used to silently hang, then eventually crash if it came across some file it didn't like,...

I just noticed something that might or might not be related. I'd deleted a bunch of photos from the desktop app (on Windows) and let the trash sync (did not...