This displays a new button on the application battery usage details
screen for the user to send a bug report to the developer, if that is
possible to do. Also adds a button to directly force stop the app
from the details screen, and uses the new facilities to determine
whether the button should be enabled.
Show packages included, time that a subsystem was on for.
Load label and icon in the background and cache the values.
Switch between totals and since-unplugged.
Other UI improvements.
