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/plug-view/plug-view.cpp

@@ -23,4 +23,4 @@ YaPlugView::ConstructArgs::ConstructArgs(
     : supported(Steinberg::FUnknownPtr<Steinberg::IPlugView>(object)) {}
 
 YaPlugView::YaPlugView(ConstructArgs&& args) noexcept
-    : arguments(std::move(args)) {}
+    : arguments_(std::move(args)) {}