After renaming a maildir local folder, every time it or anything inside it (messages or subfolders) is clicked, a message like the following appearas in the systray notification area:
"Local folders: The Maildir '/home/username/.local/share/local-mail/.inbox.directory/teste in the collection 'test' is invalid."

In this case, a folder named "teste" was renamed to "test".
The message is translated from portuguese, so it may not be exactly that in english. Please see the attached screenshot.

To solve this, I have to rename the problematic folder temporarily to any other name, create another folder with the name I want, move the contents from the problematic folder to this new one I have just created and then remove the old folder.


Reproducible: Always

Steps to Reproduce:
1. Create a local maildir folder
2. Rename the folder you have just created
3. Click on another folder and then go back to the folder you have created
Actual Results:  
Error messages like the one mentioned in the bug description pop up in the notification area. One message pops up for each item stored in the renamed folder.

Expected Results:  
No error message should be issued when the rename folder is accessed.