Required field's label to contain a CSS class to allow it to be styled differently

[Joe Kavanagh]

If a labeled dialog UI Element's required property is set to true the field's label should contain a CSS style so it can be styled differently. For example:

<label class="cke_dialog_ui_labeled_label cke_required"...

A style like the following could then be used to mark required fields:

.cke_skin_<name> .cke_dialog_ui_labeled_label.cke_required:before {

content: "* ";

}