Add a link that allows to quickly jump to ARB apps that have pending changes

[David Planella]

See comment #3. The original bug description seems to be fixed atm.

[Allison Randal (allison)]

This goes together with a feature request from UDS-Q:

When a developer submits an update, ask for update information and put that into the changelog shown in update manager.

[John Pugh (jpugh)]

The state of the application *should* not be changed when a change is submitted. Rather the change request needs to be captured, the app should show a change request (as it does already) and a notification should be sent.

Currently what needs to be implemented is the appropriate capture and review-ability of the change request. Multiple changes can be submitted, but they cannot be acted upon individually or rejected individually.

[John Pugh (jpugh)]

In discussing with bhavani (I think), the list of apps in the ARB queue is so long that they miss the "changes pending". Suggest adding a link that will allow them to see apps that have pending changes (similar to the links for a particular app state).

[Anthony Lenton (elachuni)]

Updating the bug title to reflect the change in comment #3. The rest is done, afaict