[ENH] SelectionMorphEnh-dgd ( [er][et][sm][cd] works ok, recommended )

[germanmorales at delta-sys.com]

the look and feel changes are nice, and help to see what you are
selecting.

most changes are single-line changes.

the distribution, the only part with some longer code, works right and
seems well implemented.

the only possible complain could be that the external name "Selected N
objects" could be not so right in case of N = 1, but that shouldn't stop
the approval.