Method setSubtitle

app/src/main/java/eu/faircode/email/ToolbarEx.java:52–59

(CharSequence subtitle)

    }

    @Override
    public void setSubtitle(CharSequence subtitle) {
        super.setSubtitle(null);
        TextView tv = findViewById(R.id.subtitle);
        tv.setText(subtitle);
        tv.setVisibility(subtitle == null ? GONE : VISIBLE);
        findViewById(R.id.count).setVisibility(GONE);
    }
}