Default Auto Complete Max Choices
By default, there is a maximum of 10 choices shown in an auto-complete textbox box. If you wish to change this default for all auto-complete textboxes, you may do so with this configuration option.
Example:
pui["Default Auto Complete Max Choices"] = 25;
Note that 'max choices' property on the widget takes precedence over this configuration option.
Where do you save this configuration option? Here.