Bug 1765276: Fixed d-none needing to be d-none-md instead. Changed readme for bootstrap

behatnotneeded

Change-Id: Ieacf5b42699594009157dadd2e833dd20e5f067e

htdocs/lib/bootstrap/assets/javascripts/README.Mahara

@@ -8,4 +8,4 @@ The most popular HTML, CSS, and JavaScript framework for developing responsive,
 
 Changes:
 - Only kept the 'javaScripts/' directory
-- Moved '/sass' directory to 'theme/raw/sass/lib/'
+- Moved '/scss' directory to 'theme/raw/sass/lib/'

htdocs/theme/raw/plugintype/artefact/file/templates/form/filelist.tpl

@@ -5,7 +5,7 @@
             <tr>
                 <th class="icon-cell"></th>
                 <th>{str tag=Name section=artefact.file}</th>
-                <th class="d-none">{str tag=Description section=artefact.file}</th>
+                <th class="d-none d-md-block">{str tag=Description section=artefact.file}</th>
                 <th class="filesize">
                     {str tag=Size section=artefact.file}
                 </th>
@@ -89,7 +89,7 @@
                     </a>
                 {/if}
             </td>
-            <td class="filedescription d-none">
+            <td class="filedescription d-none d-md-block">
                 {$file->description|safe|clean_html}
                 {if $showtags}
                     {if $file->tags}

htdocs/theme/raw/templates/styleguide.tpl

@@ -464,7 +464,7 @@ These are tabs to switch between pages within one section, for example in the "P
 This style of tabs is used for third-level navigation in areas where each page within this section is saved separately, for example in a group, in the résumé or in the web services configuration. When the primary school theme is selected, each arrow bar can be a different colour. This is determined by the class in the very first div. The 2 choices are 'group' (green) and 'resume' (red). There is a default option (blue) when no extra class is given.
 ```
 <div class="arrow-bar group">
-    <span class="arrow d-sm-none d-md-block">
+    <span class="arrow d-none d-md-block">
         <span class="text">
             Tabs
         </span>