syntax check in javafx fxml file is reporting 'does not support property' in KeyCodeCombination

### Apache NetBeans version

Apache NetBeans 22

### What happened

had scenebuilder create a fxml file. opened file in netbeans. netbeans indicated errors in file.

class 'javafx.scene.input.KeyCodeCombination' does not support property 'alt'. also for 'control' 'meta' 'shift' 'shortcut'.

### Language / Project Type / NetBeans Component

javafx

### How to reproduce

create stage with menubar with menuitem with shortcut in scenebuilder. open fxml file in netbeans.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

ubuntu linux mate hybrid

### JDK

version "21.0.3" 2024-04-16 build 21.0.3+9-Ubuntu-1ubuntu122.04.1

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

always.

### Are you willing to submit a pull request?

No


### Used version scenebuilder

21.0.0

### Used version javafx

javafx 21

Reproduce the issue by opening a Scene Builder-generated FXML file with a menu-item shortcut in NetBeans 22 using JavaFX 21. Start by examining the FXML syntax validation for KeyCodeCombination and its alt, control, meta, shift, and shortcut properties. Done means valid properties no longer produce false “does not support property” errors.

Written by the indexing model from the issue text.