fixes #1056 use a font-icon for page help

admin/themes/default/template/admin.tpl

@@ -145,7 +145,7 @@ jQuery(document).ready(function() {
   {if isset($U_HELP)}
 	{combine_script id='core.scripts' load='async' path='themes/default/js/scripts.js'}
   <ul class="HelpActions">
-    <li><a href="{$U_HELP}" onclick="popuphelp(this.href); return false;" title="{'Help'|@translate}"><img src="{$ROOT_URL}{$themeconf.admin_icon_dir}/help.png" alt="(?)"></a></li>
+    <li><a href="{$U_HELP}" onclick="popuphelp(this.href); return false;" title="{'Help'|@translate}" class="icon-help-circled"></a></li>
   </ul>
   {/if}
 

admin/themes/default/theme.css

@@ -1107,6 +1107,9 @@ h2:lang(en) { text-transform:capitalize; }
 
 .HelpActions a { border:0; margin:0; }
 .HelpActions li {list-style-image:none; list-style-position:outside; list-style-type:none; text-align:center; text-indent:0pt; }
+.HelpActions .icon-help-circled::before {
+  font-size: 22px;
+}
 
 legend {text-align:left;}