Fix the "header getting cut off" phenomenon

Presently, the permissions' page is not pushed automatically when the the KCM is started. Instead, it waits for the user to select an application. This caused the header to get cut off. To fix this and see a "Permissions" header, we must push the permissions' page as soon as the KCM starts. However, the ref is set to null, so the permissions still don't appear for any application until the user clicks one.

Fixes #7 (closed).