Skip reverse-geocoding if CONFIG.location.label already set

config.js

@@ -17,7 +17,8 @@
  *               by the SunCalc library (SunCalc.getTimes, getMoonTimes,
  *               getPosition). Object with 'lat' (latitude, -90 to +90)
  *               and 'lon' (longitude, -180 to +180). Positive lat = north,
- *               positive lon = east.
+ *               positive lon = east. Optionally add 'label' (string) to
+ *               set a custom place name (skips reverse-geocoding).
  *
  * timeFormat  - Format string for the digital clock, using strict
  *               ISO 8601 tokens (case-sensitive). Any other character is