Comment 0 for bug 1271944

click apps should be disabled if the required framework is not available on the image. Accordintly apps should be enabled if the required frameworks become available.

This probably involves:
 1. how to disable an app without uninstalling (so if a new/compatible app becomes availabe in the store, the app is automatically enabled
 2. how to let the scope know whether an app is "enabled" or "disabled" so it can reflect status properly in the UI.
 3. ensure we trigger check for apps and mark them as disabled on image update and when new app gets downloaded.