Work around incorrect wchar_t text serialization

`std::char_traits<wchar_t>::length()` would return the wrong length for
a wide string under Wine, and thus also for `String128`. This would
cause parts of the strings to get cut off. As a workaround we'll just
serialize the entire container including all null bytes at the end.

src/common/serialization/vst3/context-menu/context-menu.h

@@ -188,7 +188,7 @@ namespace Steinberg {
 namespace Vst {
 template <typename S>
 void serialize(S& s, IContextMenuItem& item) {
-    s.text2b(item.name);
+    s.container2b(item.name);
     s.value4b(item.tag);
     s.value4b(item.flags);
 }