Hotfix v0.2.0.2515

Improved multiplayer experience by adding a data sync progress bar

Fixed an issue where items in the inventory were lost after loading a save

Fixed an issue where deleted buildings did not return materials after loading a save

Fixed a mismatch between displayed and actual required materials in the blueprint panel

Fixed an issue where deleting conveyor lifts would return extra materials

Fixed an issue where building blueprints in multiplayer caused conveyor belts to display incorrectly