Style add comment and delete comment links as buttons

These should be styled in the same manner as the add images button.
Without this we have a mix of buttons and links that looks jarring.

Author: aolley

lib.php

@@ -535,7 +535,7 @@ function lightboxgallery_print_comment($comment, $context) {
          '</td><td class="content" align="left">'.
          format_text($comment->commenttext, FORMAT_MOODLE).
          '<div class="commands">'.
-         (has_capability('mod/lightboxgallery:edit', $context) ? html_writer::link($deleteurl, get_string('delete')) : '').
+         (has_capability('mod/lightboxgallery:edit', $context) ? html_writer::link($deleteurl, get_string('delete'), ['class' => 'btn btn-link']) : '').
          '</div>'.
          '</td></tr></table>';
 }

view.php

@@ -155,11 +155,11 @@
 
 if ($gallery->comments && has_capability('mod/lightboxgallery:addcomment', $context)) {
     $opturl = new moodle_url('/mod/lightboxgallery/comment.php', ['id' => $gallery->id]);
-    $options[] = html_writer::link($opturl, get_string('addcomment', 'lightboxgallery'));
+    $options[] = html_writer::link($opturl, get_string('addcomment', 'lightboxgallery'), ['class' => 'btn btn-primary']);
 }
 
 if (count($options) > 0) {
-    echo $OUTPUT->box(implode(' | ', $options), 'center');
+    echo $OUTPUT->box(implode(' ', $options), 'center');
 }
 
 if (!$editing && $gallery->comments && has_capability('mod/lightboxgallery:viewcomments', $context)) {