message: Fix failure to launch external edit tools with spaces in their path
diff: @@ -58,7 +58,7 @@ bool EditTool::start()
  auto signal = QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished);
  QObject::connect(process, signal, this, &ExternalTool::deleteLater);
  - process->start(QString("%1 %2").arg(editor, mFile));
  + process->start(editor, {mFile});
  if (!process->waitForStarted())
  return false;
  