Add option to clone filters on project duplication

* Fixed missing metadata option from project "create from"
* Added option to clone project custom filters
* Added append option to custom field tests
* Added a test that uses the "append" option
* Fixed disabled swimlane duplication error with Postgresql

app/Model/ProjectDuplicationModel.php

@@ -28,6 +28,7 @@ class ProjectDuplicationModel extends Base
             'projectPermissionModel',
             'actionModel',
             'tagDuplicationModel',
+            'customFilterModel',
             'projectMetadataModel',
             'projectTaskDuplicationModel',
         );
@@ -50,6 +51,7 @@ class ProjectDuplicationModel extends Base
             'actionModel',
             'swimlaneModel',
             'tagDuplicationModel',
+            'customFilterModel',
             'projectMetadataModel',
             'projectTaskDuplicationModel',
         );