* fix symetric matrix for rotated/translated quadrics
* select another displays metas also if only one geo clicked
* prevent selection of xOy plane in « select another »
* intersect tool works with quadric side

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33593 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e