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/edit-controller-2.cpp

@@ -24,4 +24,4 @@ YaEditController2::ConstructArgs::ConstructArgs(
           Steinberg::FUnknownPtr<Steinberg::Vst::IEditController2>(object)) {}
 
 YaEditController2::YaEditController2(ConstructArgs&& args) noexcept
-    : arguments(std::move(args)) {}
+    : arguments_(std::move(args)) {}