Multi Application [Support JPro runtime]

[SchweinchenFuntik]

I am using JPro (https://www.jpro.one) to create a web app. And I ran into the problem that TornadoFX does not work well with multiapplication:

• EventBus and ThreadPool are canceled;
• FX.defaultScope - global state, due to which the wrong scope is sometimes taken;
• other subtleties of TornadoFX that I do not know about.

I plan to change this, so I ask you to participate and put forward your suggestions how it should or may look like.

[SchweinchenFuntik]

I think it's worth creating a public API to stop the Application