4735: Check for updates in a separate thread

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22925 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Move css, javascript and web images to data so that they can be found by webapp

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22927 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
languages was set to a list; should be a :-separated string

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22928 4ae1f11a-8b86-4847-b8af-ab372f36d1fd