DolphinQt: Allow ConfigComplexChoice to handle DefaultState values.

Source/Core/DolphinQt/Config/ConfigControls/ConfigChoice.cpp

@@ -131,17 +131,28 @@ void ConfigComplexChoice::SaveValue(int choice)
 
 void ConfigComplexChoice::UpdateComboIndex()
 {
-  auto Get = [this](auto& setting) {
+  auto get_layer_value = [this](auto& setting) {
     if (m_layer != nullptr)
       return static_cast<OptionVariant>(m_layer->Get(setting));
 
     return static_cast<OptionVariant>(Config::Get(setting));
   };
 
-  std::pair<OptionVariant, OptionVariant> values =
+  auto get_default_value = [](auto& setting) { return OptionVariant(setting.GetDefaultValue()); };
-      std::make_pair(std::visit(Get, m_setting1), std::visit(Get, m_setting2));
 
-  auto it = std::find(m_options.begin(), m_options.end(), values);
+  auto is_current_value = [&](const InfoVariant& info, const OptionVariant& option) {
+    return std::visit(get_layer_value, info) ==
+           (std::holds_alternative<Config::DefaultState>(option) ?
+                std::visit(get_default_value, info) :
+                option);
+  };
+
+  auto is_correct_option = [&](const std::pair<OptionVariant, OptionVariant>& option) {
+    return is_current_value(m_setting1, option.first) &&
+           is_current_value(m_setting2, option.second);
+  };
+
+  auto it = std::find_if(m_options.begin(), m_options.end(), is_correct_option);
   int index = static_cast<int>(std::distance(m_options.begin(), it));
 
   // Will crash if not blocked

Source/Core/DolphinQt/Config/ConfigControls/ConfigChoice.h

@@ -53,7 +53,7 @@ class ConfigComplexChoice final : public ToolTipComboBox
   Q_OBJECT
 
   using InfoVariant = std::variant<Config::Info<u32>, Config::Info<int>, Config::Info<bool>>;
-  using OptionVariant = std::variant<u32, int, bool>;
+  using OptionVariant = std::variant<Config::DefaultState, u32, int, bool>;
 
 public:
   ConfigComplexChoice(const InfoVariant setting1, const InfoVariant setting2,