fix(microsoft): ok cannot be clicked. Closes #1729.

HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/DialogPane.java

@@ -34,7 +34,7 @@
 
 public class DialogPane extends JFXDialogLayout {
     private final StringProperty title = new SimpleStringProperty();
-    private final BooleanProperty valid = new SimpleBooleanProperty();
+    private final BooleanProperty valid = new SimpleBooleanProperty(true);
     protected final SpinnerPane acceptPane = new SpinnerPane();
     protected final JFXButton cancelButton = new JFXButton();
     protected final Label warningLabel = new Label();