Further UI improvements for new Relation Tool (Swing)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34683 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
If there is only one hypothesis in the sufficient condition then no list is shown (new Relation Tool)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34684 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e