add missing import

src/main/java/org/cryptomator/ui/addvaultwizard/CreateNewVaultLocationController.java

@@ -21,6 +21,7 @@ import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.property.StringProperty;
 import javafx.beans.value.ObservableValue;
 import javafx.fxml.FXML;
+
 import javafx.scene.Scene;
 import javafx.scene.control.Label;
 import javafx.scene.control.RadioButton;
@@ -29,6 +30,7 @@ import javafx.scene.control.ToggleGroup;
 import javafx.scene.layout.VBox;
 import javafx.stage.DirectoryChooser;
 import javafx.stage.Stage;
+import javafx.stage.WindowEvent;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;