More education-ready improvements on new Relation Tool

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34693 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Automatic update of propset svn:ignore via for svnignore.txt's by svnignore

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34694 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Using Java 6 compatible code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34695 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Better code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34696 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e