[Simulator] Create a GUI on the simulator to start a strategy program or connect to an already-running one

[Bycob]

Now that the simulator got a GUI, it would be interesting not to use the command line to choose the connection type and parameters, but do it with an interface instead.

Here is what the interface should be able to do :

• connect to an existing process
• create a process and connect to it
• stop the connection / shut down the child process
• choose the connection parameters (UDP, TCP, pipes, other)

My current idea is to have a "Connect" button that opens a contextual window, in which you can select the parameters you want. Then the "Connect" button turns to a "Disconnect" / "Stop" button while the connection is still active.

Suggestions and feedback are greatly appreciated to improve the simulator user experience :)