Add `-` as replacement for `BACKSPACE` if controlling via SSH

src/Application/Application.cpp

@@ -161,6 +161,9 @@ void Application::onCharacterReceived(KeyListenerEventData & e){
 	 case 'D':
 		args.key = OF_KEY_LEFT;
 		break;
+	 case '-':
+		args.key = OF_KEY_BACKSPACE;
+		break;
 	}
 	
 	cout << "TermListener: " << e.character << endl;