Selecting all (tiled) clones of an object

[Brian]

Similar to the Select Original, it would be nice to
select all of the Clones of a object, where the
xlink:href is the same. This could either be an option
in the Edit menu, or as a part of the Tile clones
dialog. The purpose being that you could easily group a
set of tile clones for easy management. While this is
most useful in the case of Tile clones, it could come
in handy in use with regular clones as well.