Created by: gastlich
In default, when option 'remote' is passed to modal, element with the selector '.modal-content' (according to documentation http://getbootstrap.com/javascript/#modals ) will be replaced with gathered remote content. In some cases we don't want to lose header/footer section of the modal, which have to be inside '.modal-content' element (stylesheets rules are applied for section header/footer inside '.modal-content').
This option may decrease the number of duplicated code: We can image that, page can have one default template for modals (including HTML structure and stylesheets for header/footer) and only content is different. We don't want to have header/footer structure in every remote content source, so the header/footer should be kept.
This option will be more powerful, when pull request #13183 will be merged, and it will allow to specify if modal's content should be erased on close or not.
<button data-toggle="modal" data-target="..." data-remote="..." data-remote-placement=".modal-body">
Launch demo modal
</button>