More improvements for exp. limits and some tests for that

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23967 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
bug: evNo = 1 -> this.evNo = evNo;

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23969 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e