monitoring/CSS: Don't use text-small mixin for check source reachable information

refs #5543

modules/monitoring/application/views/scripts/show/components/checksource.phtml

@@ -14,7 +14,7 @@
             } ?>
             <?= $this->escape($object->check_source) ?>
         <?php if ($object->is_reachable !== null): ?>
-            <span class="text-small"><?= (bool) $object->is_reachable ? $this->translate('is reachable') : $this->translate('is not reachable') ?></span>
+            <span class="check-source-meta"><?= (bool) $object->is_reachable ? $this->translate('is reachable') : $this->translate('is not reachable') ?></span>
         <?php endif ?>
         </p>
     </td>

modules/monitoring/public/css/tables.less

@@ -102,6 +102,7 @@
   letter-spacing: 1px;
 }
 
+.check-source-meta,
 .state-meta {
   font-size: @font-size-small;
 }