Fixed: tooltips on shutdown/restart buttons

src/UI/System/SystemLayoutTemplate.html

@@ -4,10 +4,10 @@
     <li><a href="#updates" class="x-updates-tab no-router">Updates</a></li>
     <li class="lifecycle-controls pull-right">
         <div class="btn-group">
-            <button class="btn btn-default btn-icon-only x-shutdown" title="Shutdown">
+            <button class="btn btn-default btn-icon-only x-shutdown" title="Shutdown" data-container="body">
                 <i class="icon-nd-shutdown"></i>
             </button>
-            <button class="btn btn-default btn-icon-only x-restart" title="Restart">
+            <button class="btn btn-default btn-icon-only x-restart" title="Restart" data-container="body">
                 <i class="icon-nd-restart"></i>
             </button>
         </div>