Segment name for ledmap names

index.js:
- add ledmapFileNames array and fill with lm.segmentname.json names
- use name in dropdowns and in loadmap

fcn_declare and util.cpp: move enumerateLedmaps to FX.h and FX_fcn.cpp
FX_fcn.cpp: deserializemap: use segment name lednames

wled00/wled.cpp

@@ -183,8 +183,10 @@ void WLED::loop()
     yield();
     serializeConfig();
   }
+  //WLEDMM refactored
   if (loadLedmap) {
     strip.deserializeMap(loadedLedmap);
+    strip.enumerateLedmaps(); //WLEDMM
     loadLedmap = false;
   }