QFileInfo badly manipulates with \\ for Windows network file paths

For the Windows network path: \\prtc-rssrv\rs-sync

Construct QFileInfo:

QFileInfo info(path);
auto result = path.absoluteFilePath();

Result will look like this: //prtc-rssrv/rs-sync

However that is not a valid Windows network path because "\\" was switched to "//".

This is bug and should be fixed