void OnEnable()
 {
     manifest         = new PackageManifest();
     registrySelector = new RegistrySelector();
     licenseList      = SPDXLicenseList.Load().ToStringArray();
 }
 internal ExtendedPackagePropertiesUI()
 {
     licenseList      = SPDXLicenseList.Load().ToStringArray();
     registrySelector = new RegistrySelector();
 }