Fix use of logical operators when more than one 'property changed' in 'Before document modification' event handler definition

When using more than 1 property in field Current document properties have change, logical operators OR or AND are used to generate the expression, they don't seem to work, Using || or && instead works (in field Custom EL expression).
How to reproduce:

• in Studio Modeler, create a new event handler on event Before document modification
• add the 2 following properties to field Current document properties have changed and check the At least one of box:
  • dc:title
  • dc:description
• link it e.g. to an automation script that simply produces a warning in the logs:

  function run(input, params) {
    Console.warn('<propertiesChanged> ' + input.path);
    return input;
  }
  

• deploy the Studio project to a Nuxeo instance
• create a document of type File
• edit the created document and change the title or the description

Expected result: the warning <propertiesChanged> is produced in the server.log file
Actual result: the warning <propertiesChanged> is NOT produced in the server.log file

Workaround: Use the field Custom EL expression with the following expression instead of the 2 properties in field Current document properties have changed:

(Document.doc.getProperty("dc:description").isDirty() || Document.doc.getProperty("dc:title").isDirty())