tdf#119133: Fix initial file and folder selection

what d7fc00e1 and 1af4ab72 already does
for kde5

Change-Id: I924bdc5cfd6a12ff7bdbeef36d606c03307cb99b
Reviewed-on: https://gerrit.libreoffice.org/58832
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

vcl/unx/gtk3_kde5/kde5_filepicker.cxx

@@ -91,9 +91,12 @@ void KDE5FilePicker::setMultiSelectionMode(bool multiSelect)
     _dialog->setFileMode(multiSelect ? QFileDialog::ExistingFiles : QFileDialog::ExistingFile);
 }
 
-void KDE5FilePicker::setDefaultName(const QString& name) { _dialog->selectUrl(QUrl(name)); }
+void KDE5FilePicker::setDefaultName(const QString& name) { _dialog->selectFile(name); }
 
-void KDE5FilePicker::setDisplayDirectory(const QString& dir) { _dialog->selectUrl(QUrl(dir)); }
+void KDE5FilePicker::setDisplayDirectory(const QString& dir)
+{
+    _dialog->setDirectoryUrl(QUrl(dir));
+}
 
 QString KDE5FilePicker::getDisplayDirectory() const { return _dialog->directoryUrl().url(); }