Change the naming scheme for class field members

I'm not a fan of Hungarian notation, but C++ kind of needs it with its
implicit `this`. And of all the common options for this, I find
suffixing members with an underscore the least offensive one.

src/common/serialization/vst3/plugin-factory-proxy.cpp

@@ -24,7 +24,7 @@ Vst3PluginFactoryProxy::ConstructArgs::ConstructArgs(
 
 Vst3PluginFactoryProxy::Vst3PluginFactoryProxy(ConstructArgs&& args) noexcept
     : YaPluginFactory3(std::move(args.plugin_factory_args)),
-      arguments(std::move(args)){FUNKNOWN_CTOR}
+      arguments_(std::move(args)){FUNKNOWN_CTOR}
 
       // clang-format just doesn't understand these macros, I guess
       Vst3PluginFactoryProxy::~Vst3PluginFactoryProxy() noexcept {