* Converted all SnapGridPositionChangedEvent subscriptions to AnchorStateChangedEvent.
* Fixes power tests with new anchored requirements.
* Moved AnchorableComponent into construction.
AnchorableComponent now uses Transform.Anchored.
* Fixed bug with nodes, power works again.
* Adds lifetime stages to Component.
* Update Engine to v0.4.70.
* Refactor/fix client-side of solar control computer (introduce ComputerBoundUserInterface & fix bugs)
* Refactor server side of solar control computer (introduce BaseComputerUserInterfaceComponent)
* If you can't interact, then messages to computers are blocked.
* Add 'not powered' messages, migrate activation logic partially to an EntitySystem
* Move solar control console to a XAML UI
* Remove useless comment on UserInterfaceKey
* BaseComputerUserInterfaceComponent: Remove EnsureComponent<PowerReceiver>, it's not necessary
* Fix solar panel occlusion check direction
* Solar Control Console refactors/etc. : Handle namespace renames
