Fix some properties

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21626 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Remove redundant code

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21628 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Remove post-install script for linux

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21630 4ae1f11a-8b86-4847-b8af-ab372f36d1fd