Fix Readonly plain text form alignment

Improvement to better understand how utilities class name are generated by the (_api.scss) base in the line of code below:
`$property-class: if($property-class, $property-class, nth($properties, 1));`

https://github.com/twbs/bootstrap/blob/fc02932946424e986a72bb7b47044eab815851cb/scss/mixins/_utilities.scss#L21

From #28948.

* Allow .page-links to get left margin.

* Add border-radius to page-links in case they have left margin

* Apply MartijnCuppens suggestion to _pagination.scss

Co-Authored-By: Martijn Cuppens <martijn.cuppens@gmail.com>

* Plus if/else Rules

* Formatting fixes

* Fix border-radius for pagination-size

* Use mixin for default pagination sizing

Since we build with `HUGO_ENV` set to `production` on Netlify, use another variable to prevent crawling.

"Popovers whose both title..."

For Gradient, We have to use the background-image instead of only background.

Fixed minor grammatical error:

"... the best method get scroll ..."

=>

"... the best method to get scroll ..."

This was missing since the Hugo switch (d95d3002).

* Update bs-custom-file-input.min.js to v1.3.2.
* Update anchor.min.js to v4.2.0.