Description of problem:
The icon and name of a terminated/closed application reappear on the panel.


Version-Release number of selected component (if applicable):
$ rpm -q gnome-shell
gnome-shell-2.91.92-3.fc15.x86_64


How reproducible:
Always

Steps to Reproduce:
1. start with a fresh/empty gnome shell
2. start an application (e.g. gnome-terminal)
   leave the Activites screen, enter the app
   notice the app's icon and name on the panel
3. quit the app
   notice the app's icon and name disappear from the panel
4. return to Activites screen
5. leave Activies screen

Actual results:
The app's icon and name are displayed again on the panel.

Expected results:
The terminated app's icon and name should not reappear on the panel.

Additional info:
An alternative way to reproduce it is to use just the keyboard. Press Super-key, start typing the app's name, run the app, quit it. Then enter and leave Activites screen (at least once) to see how the app's icon and name are toggled on/off despite it no longer being run.