[JBIDE-14744] allow users to choose quickstarts in application wizard

Quickstarts are now showing up in the 1st wizard page in the
application wizard. In the 2nd page one cannot add/remove
cartridges that are defined by a quickstart. You can only
edit them and choose among suitable alternatives.
Technically I had to drop IEmbeddableCartridge and
IStandaloneCartridge from the wizard since quickstarts
unfortunately wont specify those types, they only use
ICartridge.