Reset hackstate upon resetting the keyboard

src/keyboard.c

@@ -64,6 +64,7 @@ static void reset_keystate(struct keyboard *kbd)
 		if (kbd->keystate[i]) {
 			kbd->output.send_key(i, 0);
 			kbd->keystate[i] = 0;
+            kbd->keyhackstate[i] = 0;
 		}
 	}