Ahmad Samir authored Apr 22, 2022 and Tomaz Canabrava committed Jun 01, 2022

- Port QStringRef to QStringView (using Q5StringRef::toInt() because
  Q5StringView::toInt() uses toString() internally to get a QString
  which defeats the point of using a view)
- Fix creating a QKeySequence from OR'ing Qt::Key and Qt::Modifiers by
  explicitly constructing a QKeySequence; IIUC, this is due to the two
  values coming from two different enums:
  "cannot convert ‘QIncompatibleFlag’ to ‘const QKeySequence&’"
- Implicit cast from int to QChar is gone in Qt6
- Implicit cast of QString to QFileInfo is gone in Qt6
- Create a QByteArray to make QStringBuilder work
- QHash::const_iterator can't be used in place of a
  QMultiHash::const_iterator