Transactions management

OMS
- The way we handle transactions has been optimized so that no unneeded transactions are being done.
- UX optimization for showing the shipment attributes completely.
Tweakwise package
- The Tweakwise package has been updated with a more robust way of handling requests and keeping connections alive. This has been done to prevent unneeded open connections and SNAT exhaustion. Changes have been done after load testing different configurations. Axios/keep-alive is now used since this handles higher loads the best, with almost no additional latency.
General bugfixes and improvements