* Asks the user to select a new manage.py file and saves that selection.
*/
private String askNewManageSubstitution(IPythonPathNature pythonPathNature,
Map<String, String> variableSubstitution, String message) {
String manageVarible = null;
OpenResourceDialog manageSelectionDialog = createManageSelectionDialog(message);
if (manageSelectionDialog.open() == OpenResourceDialog.OK) {
Object firstResult = manageSelectionDialog.getFirstResult();
if (firstResult instanceof IFile) {
IFile iFile = (IFile) firstResult;
IPath projectRelativePath = iFile.getProjectRelativePath();
manageVarible = projectRelativePath.toPortableString();
variableSubstitution.put(DjangoConstants.DJANGO_MANAGE_VARIABLE, manageVarible);