Toob Flanger, Stereo Reverb, bug fixes

- support state in factory presets.
- Use uncompressed json for settings files.
- Set current plugin preset name to last loaded plugin preset.
- Append plugins after  start node,  before end node fixed.
- Correctly release web socket when web app goes idle.
- Fit and finish issues.

src/StateInterface.hpp

@@ -20,11 +20,12 @@
 #pragma once
 
 #include "lilv/lilv.h"
-#include "lv2/state.lv2/state.h"
+#include "lv2/state/state.h"
 #include <cstddef>
 #include "json_variant.hpp"
 #include "MapFeature.hpp"
 #include "IHost.hpp"
+#include "lilv/lilv.h"
 
 namespace pipedal
 {
@@ -65,6 +66,7 @@ namespace pipedal
     public:
         Lv2PluginState Save();
         void Restore(const Lv2PluginState &state);
+        void RestoreState(LilvState *pLv2State);
 
     private:
         struct Urids {