When multiple UI applications were connecting using the same token, the actual websocket connection was getting lost, and could eventually be garbage-collected, leading to odd behavior from the UI. This is due to an existing client getting replaced and a reference to it lost. This has now been remedied, with each client getting a unique instance with a unique client ID.
In order to match up with how existing front-end apps are expecting to
recieve data for devices that implement the `IHasInputs<T>` interface,
there is now an IHasInputsMessengers that is implemented for devices
that implement `IHasInputs<string>`, `IHasInputs<int>` or
`IHasInputs<byte>` interfaces.
In order to satisfy the requirements for the `MessengerBase` class, the
`ISelectableItemsMessenger` class needs to take an `IHasInputs<T>`, as that is
the device that implements `IKeyName`. We may want to consider adding a
`IHasInputsMessenger` specifically for those devices that implement that
interface vs the `ISelectableItemsMessenger`.
In order to solve some dependency issues that keep cropping up, MC
should be moved back into the Essentials repo and loaded automatically
on startup. This will allow for all plugins that use the MC Messengers
library to use the same version without fear of overwriting a dll due to
loading of plugin libraries.
