Sorting lists larger than 20 nodes does not work

Node order works only with a limit of 20 nodes. This is due to the use of a static value instead of dynamically calculated value as the weight delta.
On line 47 in nodeorder.admin.inc change

'#delta' => 10,

to

'#delta' => $weight_delta,

The value is calculated just a couple of line above, but not used, so I guess it was forgotten.