4.9.243.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31681 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3985 adding Custom color dialog. Completing GSpinnerW with getter/setter methods

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31682 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
reverting Giac (just 64 bit Linux) - missing file

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31683 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e