properties improvement

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35433 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
properties improvement

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35434 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
properties fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35435 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e