fixes #7389
Remove tracking on CommonITILObject create forms
 - The migration of data is already handled here and the warning is useless when some fields cause the form to reload on purpose.
Fix issue with false data-track-changes. False values become empty not false so the wrong value was tested.
Drop redundant Select2 listener
 - The select change event is already fired when using Select2. Event call order doesn't seem to matter here (change event should be fired after select2).