Fix Ledmap dropdown in presets

platformio: cosmetic updates
index.js: ledmap: show filename instead of nr
update.htm: remove installed bin prompt
json.cpp: deserializeState: assign loadLedmap from root, serializeState: assign loadLedmap to root / remove from root
presets.cpp: savePreset: assign loadLedmap from sObj
util.cpp: init ledMaps to 0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "wled",
-  "version": "0.14.0.2.1",
+  "version": "0.14.0.2.2",
   "description": "Tools for WLED project",
   "main": "tools/cdata.js",
   "directories": {