We should support custom palette entries which create a set of figures already connected to each other aka composite figures.

A good example would be a content based router. Instead of letting the user manually select the choice, the otherwise and several when nodes from the palette we could simply add a composite CBR figure which contains all those nodes already. It should be also possible to collapse and maybe go into these nodes. We should also provide a nice way to add / edit/remove When nodes.

Other examples for possible composite figures need to be determined.