Redefine slider started

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27108 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3164 defined objects are distinguished in desktop

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27109 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e