Add settings screen for setup.

Press the UP-button for 3seconds to show the settings screen.
Once in settings menu use UP/DOWN button to scroll.
The SELECT-button will change the value.

- enable/disable learning mode (when disabled it will use the default value (x=-600,y=600)
- learning position value (the SELECT-button will copy the current position of the pebble)
- vibes Lock value (change from 1..5..10..15..20..25..30)