qmlformat interferes with comment block at top of QML file (in some cases)

My testing was done with qmlformat version: qtdeclarative 7064e09e3a 2020-05-29

I have a file that previously began as:

```

// Copyright (c) 2020, 219 Design, LLC
// See LICENSE.txt
// https://www.219design.com
// Software | Electrical | Mechanical | Product Design
import QtQuick 2.12
import QtQuick.Controls 2.12
import QtGraphicalEffects 1.12
import QtQuick.Controls.Universal 2.2
import libstyles 1.0
```

And for reasons that are not apparent to me, qmlformat reordered those line as follows:

```
import QtGraphicalEffects 1.12
// Copyright (c) 2020, 219 Design, LLC
// See LICENSE.txt
// https://www.219design.com
// Software | Electrical | Mechanical | Product Design
import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Controls.Universal 2.2
import libstyles 1.0
```