Alternative implementation of world clock (#216)

* Implementation of alternative world clock.

* Fixed two minor bugs
- Only start in settings mode on first activation
- Fixed typo in time zone names

---------

Co-authored-by: joeycastillo <joeycastillo@utexas.edu>

movement/movement_faces.h

@@ -81,6 +81,7 @@
 #include "repetition_minute_face.h"
 #include "timer_face.h"
 #include "invaders_face.h"
+#include "world_clock2_face.h"
 // New includes go above this line.
 
 #endif // MOVEMENT_FACES_H_