Revert changes when opening new directory and discarding changes.

Check modification state when new directory is selected in directory
list.

kid3/id3form.cpp

@@ -630,6 +630,7 @@ void Id3Form::dirSelected(const QModelIndex& index)
 	if (!dirPath.isEmpty()) {
 		m_dirListBox->setEntryToSelect(
 				dirPath.endsWith("..") ? index.parent() : QModelIndex());
+		theApp->updateCurrentSelection();
 		theApp->openDirectory(dirPath, true);
 	}
 }

kid3/kid3.cpp

@@ -1152,6 +1152,9 @@ bool Kid3App::saveModified()
 			break;
 
 		case No:
+			if (m_view->getFileList()->selectionModel())
+				m_view->getFileList()->selectionModel()->clearSelection();
+			slotFileRevert();
 			setModified(false);
 			completed=true;
 			break;