Get href value without path or address
Set data attr values on Insert Link

So that we know which link button was pressed and what link to get
Add data attributes to link manager listing radios

So that we can track when a value has been changed
Disable link display text input boxes

To prohibit focus when tabbing between form fields
Refactor LinkManager

* It now tracks the link value within the linkValues hash upon every
user input event.
* Added a close function (after publishing link, and on
dialog:cancelled, dialog:closed) which resets the dialog to the
Internal page link tab and clears any link text inputs
* publishLink now just publishes link rather than taking care of the
dialog resetting
* Set link now updates a linkValues hash which tracks each link by type
and value to save storing it in the DOM