Qt/debugger: properly update when we load the symbols on boot

This host event is still useful because the emu thread will load the symbols on boot if required.

Source/Core/DolphinQt2/Debugger/CodeWidget.cpp

@@ -45,6 +45,8 @@ CodeWidget::CodeWidget(QWidget* parent) : QDockWidget(parent)
     Update();
   });
 
+  connect(Host::GetInstance(), &Host::NotifyMapLoaded, this, &CodeWidget::UpdateSymbols);
+
   connect(&Settings::Instance(), &Settings::DebugModeToggled,
           [this](bool enabled) { setHidden(!enabled || !Settings::Instance().IsCodeVisible()); });
 

Source/Core/DolphinQt2/Host.cpp

@@ -121,6 +121,16 @@ void Host_UpdateProgressDialog(const char* caption, int position, int total)
   emit Host::GetInstance()->UpdateProgressDialog(QString::fromUtf8(caption), position, total);
 }
 
+void Host::RequestNotifyMapLoaded()
+{
+  QueueOnObject(QApplication::instance(), [this] { emit NotifyMapLoaded(); });
+}
+
+void Host_NotifyMapLoaded()
+{
+  Host::GetInstance()->RequestNotifyMapLoaded();
+}
+
 // We ignore these, and their purpose should be questioned individually.
 // In particular, RequestRenderWindowSize, RequestFullscreen, and
 // UpdateMainFrame should almost certainly be removed.
@@ -137,9 +147,6 @@ bool Host_UINeedsControllerState()
 {
   return Settings::Instance().IsControllerStateNeeded();
 }
-void Host_NotifyMapLoaded()
-{
-}
 void Host_ShowVideoConfig(void* parent, const std::string& backend_name)
 {
 }

Source/Core/DolphinQt2/Host.h

@@ -27,13 +27,15 @@ class Host final : public QObject
   void SetRenderFocus(bool focus);
   void SetRenderFullscreen(bool fullscreen);
   void ResizeSurface(int new_width, int new_height);
+  void RequestNotifyMapLoaded();
 
 signals:
   void RequestTitle(const QString& title);
   void RequestStop();
   void RequestRenderSize(int w, int h);
   void UpdateProgressDialog(QString label, int position, int maximum);
   void UpdateDisasmDialog();
+  void NotifyMapLoaded();
 
 private:
   Host();