Allow to keep applications running when closing QtCreator

Today QtCreator already has a popup whether to Force Quit or Keep Running.

Keep Running is misleading as one might think it means "Keep applications running."

And this is what many users actually want.

It is also more logical that all choices, Keep Running, Force Quit, apply to the same thing, which in current case is applications.

Suggestion is to make "Keep Running" choice to not kill running applications when you close down Qt Creator.