Archimesh: Register Undo for some missing operators

Two operators were missing the option to enable the Undo registering.

archimesh/achm_main_panel.py

@@ -35,6 +35,7 @@ class ARCHIMESH_OT_Hole(Operator):
     bl_label = "Auto Holes"
     bl_description = "Enable windows and doors holes for any selected object (needs wall thickness)"
     bl_category = 'View'
+    bl_options = {'UNDO', 'REGISTER'}
 
     # ------------------------------
     # Execute
@@ -169,6 +170,7 @@ class ARCHIMESH_OT_Pencil(Operator):
     bl_label = "Room from Draw"
     bl_description = "Create a room base on grease pencil strokes (draw from top view (7 key))"
     bl_category = 'View'
+    bl_options = {'UNDO', 'REGISTER'}
 
     # ------------------------------
     # Execute