for prev, next, first and last page.
http://www.w3.org/TR/html401/struct/links.html#h-12.1.2

Fixes #2544: Changed `DetailView`'s `name:format:label` to `attribute:format:label` to match `GridView`

Pjax inserts the response HTML into the container, it doesn't replace it.
So any subsequent pjax requests duplicate the container.

fixes #2367

Revert "Fixes #1856: The default CSS class for hint generated by `ActiveField` is changed to `help-block`"

This reverts commit 7ae4695d.

Fixes #706: Added `yii\widgets\Pjax` and enhanced `GridView` to work with `Pjax` to support AJAX-update

fixes #2196