Change observer description strings.

This also eliminates the wrapper's selection listener
which is no longer needed.
Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

failed smtk@master-kerbin-windows-shared-release+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

failed smtk@master-norkit-osx-shared-release+examples+matplotlib

failed smtk@master-praxis-windows-shared-release

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

passed cdash

failed smtk@master-kerbin-windows-shared-release+examples+remus

00:02:08

failed smtk@master-kerbin-windows-shared-release+examples+remus

failed smtk@master-kerbin-windows-shared-release+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

00:04:51

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

00:00:03

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

00:04:57

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

00:04:51

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

failed smtk@master-norkit-osx-shared-release+examples+matplotlib

00:03:22

failed smtk@master-norkit-osx-shared-release+examples+matplotlib

failed smtk@master-norkit-osx-shared-release+examples+matplotlib

failed smtk@master-praxis-windows-shared-release

failed smtk@master-praxis-windows-shared-release

failed smtk@master-praxis-windows-shared-release

00:12:57

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

00:07:54

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

00:02:40

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

00:03:09