I think I queried this in another tracker a few weeks ago. However I thought it should be brought up as a query in its own tracker, so here goes...

The use of region-main-box was used in Bootstrapbase for a three column layout only. However now that we are only using a two column default layout we can dispense with the region-main-box container, thus cutting back on unnecessary padding/negative margins and the extra row container.

With these changes in place the page section of the columns2.mustache would then look like this:

    <div id="page" class="container">

        {{{ output.full_header }}}

        <div id="page-content" class="row">

            <section id="region-main" class="col-md-8 push-md-4">

                {{{ output.course_content_header }}}

                {{{ output.main_content }}}

                {{{ output.course_content_footer }}}

             </section>

        </div>

        {{{ sidepreblocks }}}

    </div>

Other related layouts include maintenance.mustache and columns1.mustache.