[EAK-518] Usage of scripting in nested fieldsets

[mhoroshko]

In case when we have double or triple nesting of fieldsets scripting doesn't work.
For example:

AemComponent(
    path = "default",
    title = "Scripted Component"
)
public class ScriptedComponent {
    
    @FieldSet
    @Setting(name = "isChecked", value = "true")
    private CtaFieldset ctaFieldset;
}

public class CtaFieldset {

    @FieldSet
    private CtaSettingsFieldset ctaSettings;
}

public class CtaSettingsFieldset {

    @DialogField(label = "Open in a new window?")
    @Checkbox
    @Property(name = "./checked", value = "${@isChecked ? true : false}")
    private boolean ctaNewWindow;
}

[smiakchilo]

Implemented in v. 2.5.2