Turn the touchwheel back on after sleep

src/drivers/touchwheel.cpp

@@ -38,6 +38,8 @@ TouchWheel::TouchWheel() {
   };
   gpio_config(&int_config);
 
+  WriteRegister(LOW_POWER, 1);
+
   // Configure keys 0, 1, and 2 as a wheel.
   WriteRegister(SLIDER_OPTIONS, 0b11000000);