Build 2710

More robust handling of the login port

No need to restart the system when logging level is changed

Checkbox list widget didn't work properly for single references on a form

Filters on dates didn't work for some databases

It is now possible to use Custom Lists to represent single references in forms and also multiple references using custom lists with current values selected (Custom Checkbox List widget)

State of separators (collapsed or not) is now retained when a form is saved and re-displayed

If all fields in a row of a form are read-protected by rules, the row is collapsed