* 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