CURA-3856 & CURA-3712
Just bumped the API version to 3 and added a message that is sent to the log that data was sent to the given URL. As slicing is broken here, because of "Arcus Error (5, native 32): Could not send message size" this also needs testing here.
all nescessary in folder: Cura/plugins Contributes to: issue CURA-116