Enhance BasicNewResourceWizard.selectAndReveal() such that it, for any
part, reverts to the previous selection if the current (new) selection
is not equal to the newly created IResource.

Change-Id: I8997b5179ea870f9a642d97559b3fada6767932e
Signed-off-by: Eike Stepper <stepper@esc-net.de>