Qt: Allow rebinding keyboard controls (#779)

* Initial input UI draft

Co-Authored-By: Paris Oplopoios <parisoplop@gmail.com>

* More keybinding work

Co-Authored-By: Paris Oplopoios <parisoplop@gmail.com>

* Nit

Co-Authored-By: Paris Oplopoios <parisoplop@gmail.com>

* More nits

Co-Authored-By: Paris Oplopoios <parisoplop@gmail.com>

---------

Co-authored-by: Paris Oplopoios <parisoplop@gmail.com>

include/panda_qt/main_window.hpp

@@ -43,7 +43,6 @@ class MainWindow : public QMainWindow {
 		Pause,
 		Resume,
 		TogglePause,
-		DumpRomFS,
 		PressKey,
 		ReleaseKey,
 		SetCirclePadX,
@@ -134,6 +133,9 @@ class MainWindow : public QMainWindow {
 	void dispatchMessage(const EmulatorMessage& message);
 	void loadTranslation();
 
+	void loadKeybindings();
+	void saveKeybindings();
+
 	// Tracks whether we are using an OpenGL-backed renderer or a Vulkan-backed renderer
 	bool usingGL = false;
 	bool usingVk = false;
@@ -145,6 +147,9 @@ class MainWindow : public QMainWindow {
 	bool keyboardAnalogX = false;
 	bool keyboardAnalogY = false;
 
+	// Tracks if keybindings changed, in which case we should update the keybindings file when closing the emulator
+	bool keybindingsChanged = false;
+
   public:
 	MainWindow(QApplication* app, QWidget* parent = nullptr);
 	~MainWindow();