Draft: add new options to the make_point_array function

It supports a new parameter `extra` that is used
to provide `ExtraPlacement` for the copies of the array.

Adjust the GuiCommand properly.

src/Mod/Draft/draftguitools/gui_pointarray.py

@@ -111,12 +111,14 @@ class PointArray(gui_base_original.Modifier):
         else:
             base_object = sel[0].Object
             point_object = sel[1].Object
+            extra = None
 
             Gui.addModule('Draft')
             _cmd = "Draft.make_point_array"
             _cmd += "("
             _cmd += "App.ActiveDocument." + base_object.Name + ", "
             _cmd += "App.ActiveDocument." + point_object.Name + ", "
+            _cmd += "extra=" + str(extra)
             _cmd += ")"
 
             _cmd_list = ["_obj_ = " + _cmd,