Hostgroup Overview: Provide a show more link when in compact view

refs #6677

modules/monitoring/application/views/scripts/list/hostgroups.phtml

@@ -13,6 +13,7 @@ if (! $this->compact): ?>
 <div class="content">
 <?php
 
+$hostgroups->peekAhead($this->compact);
 $firstRow = true;
 foreach ($hostgroups as $h): ?>
 <?php if ($firstRow): ?>
@@ -467,6 +468,17 @@ if ($h->hosts_down_unhandled) {
 <?php if ($hostgroups->hasResult()): ?>
     </tbody>
   </table>
+<?php if ($hostgroups->hasMore()): ?>
+  <?= $this->qlink(
+    $this->translate('Show More'),
+    $this->url()->without(array('view', 'limit')),
+    null,
+    array(
+      'data-base-target'    => '_next',
+      'class'               => 'pull-right'
+    )
+  ); ?>
+<?php endif ?>
 <?php else: ?>
   <?= $this->translate('No hostgroups found matching the filter'); ?>
 <?php endif ?>