Remove redundant __name__ assignment on SearchView

__name__ was being explicitly set to a value which was the same as the
default value.

Additionally corrected the obsolete __name__ method declaration in the
documentation which reflected the code prior to SHA:89d8096 in 2010.
Merge pull request #740 from acdha/simplify-search-view-name-property

Remove redundant __name__ assignment on SearchView