Ticket #3510: another step in web (making it impossible to drag selections which have fixed cells)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27522 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#2926: make sure conditional functions may exist as free objects

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27523 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed debugging

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27524 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3510: another step in Desktop: make it impossible to drag selections without blue dragging dot

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27525 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#2926: fixed string serialization for VecNodes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27526 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e