Bug 1032629 - APN Settings UX refresh

https://bugzilla.mozilla.org/show_bug.cgi?id=1032629
You are not handling visibility changes, aren't you? The user could add APNs through client provisioning messages while the panel is open. Once the user switches back to the APN list panel again the list must be updated with the APN  just added. This was a bug we had and fixed by updating the APN list on visibility changes.