various fixes for nano g2 gps

- baud rate changed to default
- switch state detected at boot to enable position
- small edge cases fixed
- more mesh debugging output added

Co-authored-by: LitBomb <lithangw@hotmail.com>
Co-authored-by: Nick from BOSTON

variants/nano_g2_ultra/nano-g2.h

@@ -21,6 +21,8 @@
 #define BUTTON_PIN PIN_BUTTON1
 #define PIN_USER_BTN BUTTON_PIN
 
+// GPS
+#define GPS_EN PIN_GPS_STANDBY
 // built-ins
 #define VBAT_MV_PER_LSB (0.73242188F) // 3.0V ADC range and 12-bit ADC resolution = 3000mV/4096