BIM: fix setting of self.Type

Fixes #21364.

`self.Type` should be set in `__init__` and `loads`, and not in `onDocumentRestored`.

Additionally:
fixed mistake in `loads` in ifc_objects.py.

src/Mod/BIM/ArchPanel.py

@@ -67,6 +67,7 @@ class _Panel(ArchComponent.Component):
     def __init__(self,obj):
 
         ArchComponent.Component.__init__(self,obj)
+        self.Type = "Panel"
         self.setProperties(obj)
         obj.IfcType = "Plate"
 
@@ -104,7 +105,6 @@ class _Panel(ArchComponent.Component):
             obj.FaceMaker = ["None","Simple","Cheese","Bullseye"]
         if not "Normal" in pl:
             obj.addProperty("App::PropertyVector","Normal","Panel",QT_TRANSLATE_NOOP("App::Property","The normal extrusion direction of this object (keep (0,0,0) for automatic normal)"), locked=True)
-        self.Type = "Panel"
         obj.setEditorMode("VerticalArea",2)
         obj.setEditorMode("HorizontalArea",2)
 
@@ -113,6 +113,10 @@ class _Panel(ArchComponent.Component):
         ArchComponent.Component.onDocumentRestored(self,obj)
         self.setProperties(obj)
 
+    def loads(self,state):
+
+        self.Type = "Panel"
+
     def execute(self,obj):
 
         "creates the panel shape"