Sketch for a Gimp Context-UI

This is a totally fake Sketch for a Gimp-Context UI. NOTHING IS REALLY IMPLEMENTED YET!!!

Im the Image you can see four actions:

  1. Add the UserContext to the Context-Library
  2. Drag an element from an Library-Context to the UserContext
  3. Drag an element from the UserContext to an Library-Context
  4. Change the UserContext to an Element of the Library
Of course every element in the dialog should have useful context-menus.

What Do you think?