Merge pull request #3946 from freakintoddles2/0_15

Adds an API parameter to allow the user to skip to the next preset in a playlist at any time

wled00/json.cpp

@@ -597,6 +597,8 @@ bool deserializeState(JsonObject root, byte callMode, byte presetId)
     }
   }
 
+  doAdvancePlaylist = root[F("np")] | doAdvancePlaylist; //advances to next preset in playlist when true
+  
   stateUpdated(callMode);
   if (presetToRestore) currentPreset = presetToRestore;