KeyError when pasting deleted content
1. Create a content, and a folder;
2. Cut the content;
3. Go in folder;
4. Paste the content. This work I don't have any paste button anymore;
5. Go up in the parent folder;
6. I have a paste button, I can click on it this bring back the content in his original position. This is a nice feature;
7. Go back in the folder;
8. Like for 6. I have a paste button and can paste the content, I do it;
9. Go up in the parent folder; I have a paste button;
10. Delete the folder with the content;
11. I always have the paste button, I click on it;
12. I get an KeyError.
In a more generic way, this happens then pasting all deleted and cutted content. Zope 2 doesn't have this problem. If we can't remove the paste button in step 11, at least display a nice error message.