BUG: stop after unable to create dir.

An interim test of continuing on to the next series after
being unable to create the export directory had been left in,
this commit halts the export after the first.
Added a suggestion to repair the database if a source file
is not found.

Slicer Issue #3163

Libs/DICOM/Widgets/ctkDICOMBrowser.cpp

@@ -967,13 +967,13 @@ void ctkDICOMBrowser::exportSelectedSeries(QString dirPath, QStringList uids)
         {
         QString errorString =
           QString("Unable to create export destination directory:\n\n")
-          + destinationDir;
+          + destinationDir
+          + QString("\n\nHalting export.");
         ctkMessageBox createDirectoryErrorMessageBox;
         createDirectoryErrorMessageBox.setText(errorString);
         createDirectoryErrorMessageBox.setIcon(QMessageBox::Warning);
         createDirectoryErrorMessageBox.exec();
-        // go on the the next series if present
-        continue;
+        return;
         }
       }
 
@@ -1012,7 +1012,7 @@ void ctkDICOMBrowser::exportSelectedSeries(QString dirPath, QStringList uids)
         d->ExportProgress->setValue(numFiles);
         QString errorString = QString("Export source file not found:\n\n")
           + filePath
-          + QString("\n\nHalting export.");
+          + QString("\n\nHalting export.\n\nError may be fixed via Repair.");
         ctkMessageBox copyErrorMessageBox;
         copyErrorMessageBox.setText(errorString);
         copyErrorMessageBox.setIcon(QMessageBox::Warning);