Path: Allow parent job assignment

Modifications focus on allowing the creation of operations to include direct provision of parent job.
Path: Remove `useGui` implementation

src/Mod/Path/PathScripts/PathPocketShape.py

@@ -242,11 +242,11 @@ def SetupProperties():
     return setup
 
 
-def Create(name, obj=None):
+def Create(name, obj=None, parentJob=None):
     '''Create(name) ... Creates and returns a Pocket operation.'''
     if obj is None:
         obj = FreeCAD.ActiveDocument.addObject('Path::FeaturePython', name)
-
-    obj.Proxy = ObjectPocket(obj, name)
+    obj.Proxy = ObjectPocket(obj, name, parentJob)
+    return obj
 
     return obj