…l) from the selected packicon via a colorbox control

stuff added:

• colorbox control (most code from here
  • cleaned up the style
  • fixed some of the code style
  • removed bloat
• ImageGeneratorViewModel wrapping the image creation logic
• PackIconDataFactory and a corresponding interface to get the path data via enum type and name
• ObservableObject (from my own library)
• BusyStack (from my own library)
• BusyToken (from my own library)
• RelayCommands (from my own library)
• DispatcherFactory (from my own library)

let me know, if there is something that i can do to improve this PR