citra-qt: Use Qt 5 signal/slots where applicable

Makes the signal/slot connections type-safe instead of string-based.

src/citra_qt/debugger/graphics/graphics_breakpoint_observer.h

@@ -23,11 +23,11 @@ public:
     void OnPicaBreakPointHit(Pica::DebugContext::Event event, void* data) override;
     void OnPicaResume() override;
 
-private slots:
-    virtual void OnBreakPointHit(Pica::DebugContext::Event event, void* data) = 0;
-    virtual void OnResumed() = 0;
-
 signals:
     void Resumed();
     void BreakPointHit(Pica::DebugContext::Event event, void* data);
+
+private:
+    virtual void OnBreakPointHit(Pica::DebugContext::Event event, void* data) = 0;
+    virtual void OnResumed() = 0;
 };

src/citra_qt/debugger/graphics/graphics_breakpoints.h

@@ -26,18 +26,17 @@ public:
     void OnPicaBreakPointHit(Pica::DebugContext::Event event, void* data) override;
     void OnPicaResume() override;
 
-public slots:
-    void OnBreakPointHit(Pica::DebugContext::Event event, void* data);
-    void OnItemDoubleClicked(const QModelIndex&);
-    void OnResumeRequested();
-    void OnResumed();
-
 signals:
     void Resumed();
     void BreakPointHit(Pica::DebugContext::Event event, void* data);
     void BreakPointsChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight);
 
 private:
+    void OnBreakPointHit(Pica::DebugContext::Event event, void* data);
+    void OnItemDoubleClicked(const QModelIndex&);
+    void OnResumeRequested();
+    void OnResumed();
+
     QLabel* status_text;
     QPushButton* resume_button;
 

src/citra_qt/debugger/graphics/graphics_breakpoints_p.h

@@ -25,7 +25,6 @@ public:
 
     bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole) override;
 
-public slots:
     void OnBreakPointHit(Pica::DebugContext::Event event);
     void OnResumed();
 

src/citra_qt/debugger/graphics/graphics_surface.h

@@ -86,16 +86,15 @@ public slots:
     void OnSurfacePickerYChanged(int new_value);
     void OnUpdate();
 
-private slots:
+signals:
+    void Update();
+
+private:
     void OnBreakPointHit(Pica::DebugContext::Event event, void* data) override;
     void OnResumed() override;
 
     void SaveSurface();
 
-signals:
-    void Update();
-
-private:
     QComboBox* surface_source_list;
     CSpinBox* surface_address_control;
     QSpinBox* surface_width_control;