added callback to robot context that allows forcing an upgrade to be saved and resent to clients, to allow upgrades to manually synchronize their data with clients for state specific rendering; using this to transmit generator state (running or not) and show a different texture accordingly; fixed a bug where remaining runtime wasn't saved for generators when no more items were in their internal inventory; implementing contexts in their respective tile entities, too, to allow external components to refer to their owners via the context interfaces
10 files changed
