Add prototype drawing style UI

src/ifcblenderexport/blenderbim/bim/__init__.py

@@ -180,6 +180,10 @@ if bpy is not None:
         operator.CalculateObjectVolumes,
         operator.AddOpening,
         operator.SetOverrideColour,
+        operator.AddDrawingStyle,
+        operator.RemoveDrawingStyle,
+        operator.SaveDrawingStyle,
+        operator.ActivateDrawingStyle,
         prop.StrProperty,
         prop.Variable,
         prop.Role,
@@ -196,6 +200,7 @@ if bpy is not None:
         prop.ClashSource,
         prop.ClashSet,
         prop.Constraint,
+        prop.DrawingStyle,
         prop.BcfTopic,
         prop.BcfTopicLabel,
         prop.BcfTopicFile,