Cleanup and small issues

pio.ini: cleanup debug directives (build_flags_min move to _debug), remove blynks

index.htm/js: 
- visualization in div to turn of if 1D
- scale visualizations if height>width

json.cpp, util.cpp: USER/DEBUG_PRINT changes

wled00/wled.cpp

@@ -228,6 +228,7 @@ void WLED::loop()
     avgUsermodMillis = 0;
     avgStripMillis = 0;
     debugTime = millis();
+    DEBUG_PRINTLN(F("---END OF DEBUG INFO---"));
   }
   loops++;
 #endif        // WLED_DEBUG