582259 - Undoing deleting a disabled addon did not work on Firefox 4 Beta 1

Status: VERIFIED DUPLICATE of bug 553494

(Toolkit :: Add-ons Manager, defect)

Description

[Dave Spectar]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8

When I installed Firefox 4.0 Beta 1, I went to look at the addons. I noticed several of the addons weren't supported so I decided to remove them. However, then I recalled that Firefox will check to see if the addon has been upgrade to work in Firefox 4. So I decided to undo my deletion and I clicked on the Undo button. Nothing happened

Reproducible: Always

Steps to Reproduce:
1. In the menu, click Customize -> Addons
2. Observe a list of Firefox 3.6 addons, some of which are disabled because they are not compatible
3. Click to remove each one.
4. Click undo
Actual Results:  
Nothing happened. When I restarted firefox 4.0 beta 1, the addons where removed.

Expected Results:  
The undo action should succeed and I should be allowed to undo removing the addon.