[CMake] How to change the "Start in" directory for Windows Start menu shortcuts

[Ben Medina]

Hello all,

We're using NSIS via CPack for our Windows installer. One thing we'd
like to change is the "Start in" directory for Windows Start menu
shortcuts. Currently, it appears to default to the installation
directory, but that's not very useful: users aren't going to be saving
files underneath C:\Program Files\MyApp. Is it possible to change the
start in directory?

Thanks,
Ben