Add 'Power Cycle' hotkey

Closes #25.

bsnes/target-bsnes/input/hotkeys.cpp

@@ -151,6 +151,10 @@ auto InputManager::bindHotkeys() -> void {
     program.reset();
   }));
 
+  hotkeys.append(InputHotkey("Power Cycle").onPress([] {
+    program.power();
+  }));
+
   hotkeys.append(InputHotkey("Quit Emulator").onPress([] {
     program.quit();
   }));

bsnes/target-bsnes/program/game.cpp

@@ -308,6 +308,14 @@ auto Program::reset() -> void {
   showMessage("Game reset");
 }
 
+auto Program::power() -> void {
+  if(!emulator->loaded()) return;
+  rewindReset();
+  hackCompatibility();
+  emulator->power();
+  showMessage("Power cycle");
+}
+
 auto Program::unload() -> void {
   if(!emulator->loaded()) return;
   //todo: video.clear() is not working on macOS/OpenGL 3.2

bsnes/target-bsnes/program/program.hpp

@@ -24,6 +24,7 @@ struct Program : Lock, Emulator::Platform {
   auto loadSufamiTurboB(string location) -> bool;
   auto save() -> void;
   auto reset() -> void;
+  auto power() -> void;
   auto unload() -> void;
   auto verified() const -> bool;