Method undo

app/src/main/java/eu/faircode/email/ActivityView.java:1521–1532

(String title, final Bundle args, final SimpleTask<Void> move, final SimpleTask<Void> show)

    }

    public void undo(String title, final Bundle args, final SimpleTask<Void> move, final SimpleTask<Void> show) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        int undo_timeout = prefs.getInt("undo_timeout", 5000);

        if (undo_timeout == 0) {
            if (move != null) {
                move.execute(this, args, "undo:move");
                show.cancel(this);
            }
        } else
            undo(undo_timeout, title, args, move, show);
    }

    private Snackbar undo(long undo_timeout, String title, final Bundle args, final SimpleTask move, final SimpleTask show) {
        if (drawerLayout == null || drawerLayout.getChildCount() == 0) {