Comment 2 for bug 759174

For reference, this is the code which I used to create the crash:
https://code.launchpad.net/~bilalakhtar/update-manager/unity-quicklist/+merge/57289

I am actually working on update-manager support for dynamic quicklists, and I need to hide the 'Install all updates' button when there are no updates. If I do that and then right-click update-manager in launcher, Unity crashes.