Extend URL, CopyClipboardURL widget features to ease customization of anchor's text.

By default, the URL, CopyClipboardURL widget will show the plain URL. You can specify an
attribute to provide a static label too.

With this module, you can use a field for link's inner text using
attribute 'text_field'. You can also add a prefix to the link using
attribute 'prefix_name'.

Until 13.0 this functionality was separated in modules
'web_widget_url_advanced' and 'web_widget_prefixed_url'
