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.

.vscode/launch.json

@@ -7,6 +7,7 @@
 
 
 
+
         {
             "name": "(gdb) generic",
             "type": "cppdbg",
@@ -50,6 +51,10 @@
                     // it gets resolved by CMake Tools:
                     "name": "PATH",
                     "value": "$PATH:${command:cmake.launchTargetDirectory}"
+                },
+                {
+                    "name": "LD_LIBRARY_PATH",
+                    "value": "/usr/local/lib/aarch64-linux-gnu"
                 }
             ],
             "externalConsole": false,
@@ -73,7 +78,8 @@
             "args": [
                 //"[Dev]"  -- all dev-machine tests.
                 //"[json_variants]"  // subtest of your choice, or none to run all of the tests.
-                "[inverting_mutex_test]"
+                //"[inverting_mutex_test]"
+                "[utf8_to_utf32]"
             ],
 
             "stopAtEntry": false,