NeoEditor captures NoSuchMethodErrors on setSelection but does not handle them

[gdaniel]

There is a try .. catch that avoid nasty Eclipse-level error message. This error occurs when an editor is opened with a resource loaded using a Dynamic EPackage. The command creation creates a DynamicEObject somehow, that is sent to a contains methods that fails on the proxy capture of id()

This exception need to be handled / avoided, by supporting Dynamic EMF in the Editor.

[yvrng]

Since 730ac38: This exception is now handled internally, and has been replaced by an UnsupportedOperationException.