[Mac] ClassCastException when selecting a color in FontDialog

[Phillipus]

Describe the bug
Changing the Font and the Color in a FontDialog on Mac leads to CCE

To Reproduce
Use this snippet to test, or just change a font and font color in Eclipse.

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Shell;

public class MacFontDialogError {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        
        FontDialog dialog = new FontDialog(shell);
        dialog.open();

        display.dispose();
    }
}

1. Run Snippet.
2. When the font dialog opens, select a different font (important to do this step)
3. Then from the drop-down menu at the top left of the dialog, select "Color..." and change the color in the Color chooser
4. CCE in Display class at line 5991 - in this case it's a FontDialog not a ColorDialog.

Expected behavior
Should not cause CCE.

Environment:

1. Select the platform(s) on which the behavior is seen:

• • All OS
• • Windows
• • Linux
• • macOS

2. Additional OS info (e.g. OS version, Linux Desktop, etc)
   macOS Sonoma and Sequoia

3. JRE/JDK version
   JDK 17 or 21, doesn't matter.

Version since
Probably a long time.