Installation/removal status text isn't shown in list view

[Matthew Paul Thomas]

software-center trunk r2261, Ubuntu 11.10 beta 1

1. Navigate to a list view, such as the search results for "editor".
2. Select an item, and click "Install" or "Remove" in the list.

What happens:
* A progress bar appears in the list view.
* The line of text below the software title does not change.

What should happen:
* The item summary is temporarily replaced by status text: "Waiting", "Downloaded 3.0 of 14.7 MB", "Installing", and so on.

<https://wiki.ubuntu.com/SoftwareCenter#software-list-view>: "When an item is being installed, being removed, having its add-ons changed, or queued for any of those tasks ... the secondary text for the row should be the status text for the task, instead of the item’s summary."