4.0.0RC4

=> Build system updates and support for XCode 11 and macOS Catalina
=> Notarized to pass Apple Gatekeeper checks
=> Dark Mode support
=> 3D issues fixed (#531, #533)
=> 64-bit odt2pdf support for report PDF generation (#532)
=> 64-bit DICOM printing (grayscale only) (#532)
=> Missing annotations fix (#535)
=> Other minor fixes and enhancements