New custom palettes editor (#5010)

* full refactoring, added live preview, better minifying in cdata.js
* update main UI buttons, support for gaps in cpal files, cpal UI cleanup
* fixed some layout issues, added un-ordered cpal deletion
* changed to tab indentation, paste button border color now holds stored color
* fix preview to work properly and some other fixes in UI
* always unfreeze
* new approach to loading iro.js, add harmonic random palette, many fixes.
* decoupling iro.j, update UI of cpal.htm
- load iro.js sequentially
- no parallel requests in cpal.htm
- update UI buttons
- fix showing sequential loading of palettes (using opacity)
- better UX for mobile (larger markers, larger editor)
- various fixes
* small change to buttons
* load iro.js dynamically, remove iro.js from index.htm, revert changes to cdata.js
* improved visibility for very dark/black palettes and markers

usermods/audioreactive/audio_reactive.cpp

@@ -1742,14 +1742,14 @@ class AudioReactive : public Usermod {
         }
 #endif
       }
-      if (root.containsKey(F("rmcpal")) && root[F("rmcpal")].as<bool>()) {
+      if (palettes > 0 && root.containsKey(F("rmcpal"))) {
         // handle removal of custom palettes from JSON call so we don't break things
         removeAudioPalettes();
       }
     }
 
     void onStateChange(uint8_t callMode) override {
-      if (initDone && enabled && addPalettes && palettes==0 && customPalettes.size()<10) {
+      if (initDone && enabled && addPalettes && palettes==0 && customPalettes.size()<WLED_MAX_CUSTOM_PALETTES) {
         // if palettes were removed during JSON call re-add them
         createAudioPalettes();
       }