7110: add up-to-date screenshots to AppData file

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23296 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Fix for when active_handle is ''

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23297 4ae1f11a-8b86-4847-b8af-ab372f36d1fd