[Evolution-hackers] a question about removing a folder!

[jack.jia]

Hello  Rodrigo & JP!
When the user delete a calendar subfolder in the local calendar from UI, 
evolution should delete the view and backend binded with the subfolder. 
But I found it can not delete the backend,  I believe evolution must 
delete the backend binded with the subfolder.  Because the wombat is 
alive for ever. If the user add a new subfolder with the same name as 
the deleted subfolder from UI.  The calendar will not create a new 
backend and use the orignal backend belong to the deleted subfolder 
because they had the same uri.  

If evolution can not delete the backend when it remove a subfolder. it 
will create mem leak.

so, I believe it is a critical bug in evolution. Could you fix this bug 
or give me some suggestion.

Thanks
jack