Sapphire v2.5.9 - new module Echo (#832)

* 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.

* Sapphire v2.5.9 attempt 2: fixed memory errors

* Sapphire v2.5.9 - fixed build problem for Windows.

There was a compatibility problem between MINGW and
my own member function named `format`. I don't need MINGW
so I disabled it in the Cardinal Makefile.

This solution was suggested by @falkTX.
It is nice because I don't have to change any Sapphire code!

plugins/Makefile

@@ -2763,6 +2763,7 @@ $(BUILD_DIR)/Sapphire/%.cpp.o: Sapphire/%.cpp
 	@echo "Compiling $<"
 	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) -std=gnu++17 -c -o $@ \
 		$(foreach m,$(SAPPHIRE_CUSTOM),$(call custom_module_names,$(m),Sapphire)) \
+		-DSKIP_MINGW_FORMAT \
 		-DpluginInstance=pluginInstance__sapphire
 
 $(BUILD_DIR)/sonusmodular/%.cpp.o: sonusmodular/%.cpp

plugins/Sapphire

@@ -1 +1 @@
-Subproject commit c65bf21e00c984613749ce76ba07633f3eb8d61f
+Subproject commit a1f7deb7931b7ef0fc4fa9f8a3871d9e37e81e73

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);