Comment 12 for bug 733669

Not sure exactly how to solve this. A few suggestions for debate:

 1) Simply don't show uninstalled apps in the Dash homescreen. Only in the apps place (super easy fix)
 2) Add some "web" emblem to the uninstalled app icons (easy in unity-place-applications, but may need shell integration to work..?)
 3) Prefix name labels with "Download: " or something. This will probably result in an ellipsis nightmare, but is trivial to implement
 4) Split out in a different section in the Dash (requires some work in both the place daemon and in the Unity shell)