Please describe the problem:
When creating a directory, if we enter a name then erase it, then click close, the application says "the name of the launcher is not set"

Steps to reproduce:
(Through alacarte)
1. Open alacarte
2. Click New Menu, the Directory Properties dialog opens
3. Enter any directory name, then erase it and then click Close


Actual results:
An error message "the name of the launcher is not set" popups, but there isn't any launcher to set.

Expected results:
If we don't set any names when the dialog opens, closing doesn't do anything, so I would expect that entering a name and removing it wouldn't do anything either.

Does this happen every time?
Yes

Other information: