Fix header for operating system

Author: Kristan Kenney

web/templates/admin/list_services.html

@@ -58,7 +58,7 @@
                 </td>
                 <td>
                   <div class="l-unit__stat-cols clearfix">
-                    <div class="l-unit__stat-col l-unit__stat-col--left wide"><?=$sys['sysinfo']['Operating System']?></div>
+                    <div class="l-unit__stat-col l-unit__stat-col--left wide"><b><?=__('Operating System')?>:</b></div>
                     <div class="l-unit__stat-col l-unit__stat-col--right"><?=$sys['sysinfo']['OS']?> <?=$sys['sysinfo']['VERSION']?> (<?=$sys['sysinfo']['ARCH']?>)</div>
                   </div>
                 </td>