Convert uncollected objects tool into a gramplet

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23243 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Add new ancestor and descendant gramplets

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23244 4ae1f11a-8b86-4847-b8af-ab372f36d1fd