In several places the admin part of PlatformUI, the user should confirm that he really wants to do something. This is needed for instance when removing the content type, see https://github.com/ezsystems/PlatformUIBundle/pull/279#issuecomment-121709110

Basically, the server side view should recognize that the form was submitted with a ez-confirm-action button and launch the confirm box with what is provided in the markup.

<form>
<!-- ... -->
<button class="ez-button-remove ez-button pure-button ez-confirm-action" data-confirmbox-title="Do you really want to remove the 'Foobar' content type?" data-confirmbox-details-selector=".ez-confirmbox-content-type-removal-details">Remove</button>
<!-- ... -->
</form>

<div class="ez-confirmbox-content-type-removal-details">
<p>The <b>34</b> 'Foobar' instances will be permanently removed by this operation.</p>
</div>

This story also involves a change in the confirm box system to accept in addition to the existing attributes a details attribute that should contain some HTML to be displayed in the confirm box view.