Allow URL Input to Accept a Token

Problem/Motivation

The URL field in the configuration is not currently set up to accept tokens. Tokens should be able to be generated dynamically based on content or current page.

Steps to reproduce

Put a token into the URL field on block configuration and see that the token is rendered as a plain-text token in the front end UI.

Proposed resolution

Add logic to `addtoany_create_data()` in `addtoany.module` to allow the URL to be converted via Token if it is a token.

Remaining tasks

User interface changes

Likewise, the description of the field should include a link that provides the AJAX Popup for available tokens.

API changes

NONE

Data model changes

NONE