Description of problem:
Once the update list is displayed by "pup", seleting a package and
clicking "Update Details" opens another pane for the package data.
As the windows size remains unaltered, the update list pane's size
gets reduced to allocate the necessary space. However, upon clicking
"Update Deatils" again, the package data pane gets closed leaving a
grey border behind, instead of remaximizing the package list pane
[see attached screenshot].

Version-Release number of selected component (if applicable):
pirut-1.2.10-1.fc7

How reproducible:
Always.

Steps to Reproduce:
1. Launch "pup".
2. Download list of updated packages.
3. Select a package and click "Update Details".
4. Click "Update Details" again.
  
Actual results:
Package list pane retains it reduced size.

Expected results:
Package list pane gets maximized again.

Additional info:
None.