Show correct directory config after application start.

The directory button now shows the value read from the settings.

Libs/DICOM/Widgets/ctkDICOMAppWidget.cpp

@@ -129,7 +129,7 @@ void ctkDICOMAppWidget::setDatabaseDirectory(const QString& directory)
 
   //pass DICOM database instance to Import widget
   // d->ImportDialog->setDICOMDatabase(d->DICOMDatabase);
-
+  d->directoryButton->setDirectory(directory);
 }
 
 void ctkDICOMAppWidget::onAddToDatabase()