#4457 - opacity added for GeoLines on desktop

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35340 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
probably a bug

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35341 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4457 - opacity for line of the conics added

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35342 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e