Pick interior only if not totally transparent

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25282 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Center the view when click default button

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25283 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e