fix suggestion

main/ui/src/main/java/org/cryptomator/ui/mainwindow/VaultListController.java

@@ -23,6 +23,7 @@ import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
 import javafx.scene.control.ListView;
 import javafx.stage.Stage;
+import java.util.Arrays;
 import java.util.Optional;
 
 import static org.cryptomator.common.vaults.VaultState.*;