Sapphire v2.5.9 - new module Echo

Added a new multitap delay module: [Echo](https://github.com/cosinekitty/sapphire/blob/main/doc/Echo.md).
Added "neon mode" menu options to make the Sapphire panel glow. This effect is most visible when the room brightness is dim.
Chaops did not reset the FREEZE button on initialize. This has been fixed.
Fixed minor polyphony bug in Env: the number of channels in the GAIN control's CV input did not affect the number of output channels. This has been fixed.
Fixed typos in help text for Gravy and Sauce.

plugins/Sapphire

@@ -1 +1 @@
-Subproject commit c65bf21e00c984613749ce76ba07633f3eb8d61f
+Subproject commit 93c1005e21d79748a9b6f481a431ce90285a666d

plugins/plugins.cpp

@@ -3213,6 +3213,9 @@ static void initStatic__Sapphire()
     if (spl.ok())
     {
         p->addModel(modelSapphireChaops);
+        p->addModel(modelSapphireEcho);
+        p->addModel(modelSapphireEchoOut);
+        p->addModel(modelSapphireEchoTap);
         p->addModel(modelSapphireElastika);
         p->addModel(modelSapphireEnv);
         p->addModel(modelSapphireFrolic);