Add the CURA_DIGITAL_FACTORY_URL variable

This way its value will be imported in the UltimakerCloudConstants.py file and be used throughout the application.

cura/CuraVersion.py.in

@@ -9,4 +9,5 @@ CuraDebugMode = True if "@_cura_debugmode@" == "ON" else False
 CuraCloudAPIRoot = "@CURA_CLOUD_API_ROOT@"
 CuraCloudAPIVersion = "@CURA_CLOUD_API_VERSION@"
 CuraCloudAccountAPIRoot = "@CURA_CLOUD_ACCOUNT_API_ROOT@"
-CuraMarketplaceRoot = "@CURA_MARKETPLACE_ROOT@"
+CuraMarketplaceRoot = "@CURA_MARKETPLACE_ROOT@"
+CuraDigitalFactoryURL = "@CURA_DIGITAL_FACTORY_URL@"