message: fix text issues
diff: @@ -505,7 +505,7 @@ void HunkWidget::stageSelected(int startLine, int end, bool emitSignal) {
  QString name = mPatch.name();
  int line = mPatch.lineNumber(mIndex, 0, git::Diff::NewFile);
  - QString title = HunkWidget::tr("Discard Hunk?");
  + QString title = HunkWidget::tr("Discard selected lines?");
  QString text = mPatch.isUntracked() ?
  HunkWidget::tr("Are you sure you want to remove '%1'?").arg(name) :
  HunkWidget::tr("Are you sure you want to discard the "
  @@ -515,7 +515,7 @@ void HunkWidget::stageSelected(int startLine, int end, bool emitSignal) {
  QMessageBox::Warning, title, text, QMessageBox::Cancel, this); dialog->setAttribute(Qt::WA_DeleteOnClose);
  dialog->setInformativeText(HunkWidget::tr("This action cannot be undone."));
  - QPushButton *discard = dialog->addButton(HunkWidget::tr("Discard Hunk"), QMessageBox::AcceptRole);
  + QPushButton *discard = dialog->addButton(HunkWidget::tr("Discard selected lines"), QMessageBox::AcceptRole);
  connect(discard, &QPushButton::clicked, [this, startLine, end] {
  discardSelected(startLine, end);
  });
  