In more detail:
- Some adaptations due to the code style.
- Some changes that @abika proposed in https://phabricator.kde.org/D24987.
- Some comments were improved or added.
- In one line: sym link was replaced with symlink, as in all the source code of Krusader.
- A KMessageBox::sorry() is used the same way that it's utilized in void ListPanelFunc::editFile(const QUrl &filePath), where it's written KMessageBox::sorry(krMainWindow, i18n("You cannot edit a folder"));.