Added setting to remember last device selected.
Added in Moto X 2nd Gen. (Moto X 2nd Gen has logo_charge, logo_lowpower in addition to the usual 3. It also has a larger screen.)
Added in Moto G 2nd Gen.  (Moto G 2nd Gen currently does not include logo_charge despite having kitkat 4.4.4.)

Fixed a few bugs that were introduced in the 1.9 update.