Refactor

[sebllll]

refactors Server and Client into digestable operations.

this includes everything from #4

Server:

Client:

[sebllll]

This doesn't change the functionality/principle of the nodes. the idea was just to give it structure and comments, so that it's easier in the future to maintain the lib.

along the way 2 bugs are fixed:

1. connection behavior on app start. (wasn't working reliable in some situations)
2. disabling a server now also disconnects all clients (clients were still connected before)

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btw. i just spotted a potential bugger in the screenshot: the Data node in the servers Start operation should be inside the delegate region. i'll push another fix commit for this.

[sebllll]

to be more precice:

ad 1:
sometimes (quite seldom) it can happen that you end up in a state, where the connected pin is misleading, like in this screenshot:

the client thinks he is connected, but is not. i 'achieved' this situation with this test-patch i built and after pressing some F8/F5s, it happens really rarely, so not a super big issue, but i investigated a bit and found that it doesn't happen, when the server delays the connection in the very first frame only:

This is really debatable and maybe should be reversed?

ad 2:
i stumbled over the following exeption when en-/disabling the server (in the actual master):

This exception can be avoided if Stop() is only executed when IsListening() = true like so:

then, i saw a situation where disabling the server still had a client think he is connected (like in the first screenshot). i can't reproduce that now though.
To avoid those things, i added this to the stop operation: