fix issue that if located variable was dropped in location column, then address was changed in wrong row (row - 1).
It's not neccessary to carry about label size. YToRow() does the work.
These classes are intended for use server-side.
e.g. in a django view.py :
from pyjs.jsonrpc.django import JSONService, jsonremote
jsonservice = JSONRPCService()
@jsonremote(jsonservice)
def test(request, echo_param):
return "echoing the param back: %s" % echo_param