- Model now properly skips the addition of nodes if they not enabled
(why was that not already done??)
- NodeDialog now properly saves the initial activity also for the
log-scale (may need to see what initial activity is shown when editing a
node with log-scale, though)
- The T.A. templates for log-scale actually check also the "delta >= 0"
condition in can(t)_react(), which allows to avoid timelocks in the
updating location.