message: if only one file left, show singular
diff: @@ -1045,7 +1045,10 @@ public:
  if (numberFiles > s + 1) {
  msg += list.at(s) + QStringLiteral(", ");
  - msg += QStringLiteral("and %1 more files").arg(numberFiles - s - 1);
  + const int remainingFiles = numberFiles - s - 1;
  + msg += QStringLiteral("and %1 more file").arg(remainingFiles);
  + if (remainingFiles > 1)
  + msg += QStringLiteral("s");
  } else {
  msg += QStringLiteral("and %1").arg(list.at(s));
  }
  