Returns a JSDataSet with outstanding (not saved) changed data of this record.
column1 is the column name, colum2 is the old data and column3 is the new data.
NOTE: To return an array of records with outstanding changed data, see the function databaseManager.getEditedRecords().
Returns true or false if the record is being edited or not.
This will not check if the record doesn't really have any changes, it just returns the edit state.
So this can return true but databaseManager.getEditedRecord() will not return this record because that
call will check if the record has really any changed values compared to the stored database values.