The 'Link' element and other elements that include the group of link settings have an option to Add / Remove / Toggle a modifier.
When this action is taken, the element(s) targeted by the jQuery selector are given a class of coh-transition if/while they are transitioning.
This allows transition properties to only be applied when this class is present and not at any other time. For example, when the browser is resized.
This feature prevents unexpected transition animations from showing when a user changes the resolution of their browser.