Savestates: Implement Ctrl+R to reload the most recent savestate

Ctrl+R no longer means Resume emulation, this functionality has been transferred to Ctrl+P which is also capable of pausing the emulation. (so it's now a toggle)

rpcs3/main.cpp

@@ -1176,7 +1176,6 @@ int main(int argc, char** argv)
 		return 0;
 	}
 
-
 	// run event loop (maybe only needed for the gui application)
 	return app->exec();
 }