Check if javafx-swing should be included as a dependency #22

What?

In #21 javafx-swing was added as a dependency but I am not sure if we need this or if there are viable alternatives. We don't want to integrate Swing code into the JavaFX project unless there is a really good reason, since it is generally not advised to mix the two.

This is an investigative ticket. Findings should be put under this issue and can be escalated to a bug or feature ticket if we decide to make changes (should be done in a new ticket)