Bug 1048772 - Incorrect value in "app.update.battery-threshold.plugged" and "app.update.battery-threshold.unplugged" are allowed
Merge pull request #22517 from lodr/bug-1048772-prevent-incorrect-values

Bug 1048772 - Incorrect value in "app.update.battery-threshold.plugged" and "app.update.battery-threshold.unplugged" are allowed
r=etienne