improved toolbar appearing to load slowly

lib/scripts/edit.js

@@ -40,6 +40,8 @@ function createToolButton(icon,label,key,id,classname){
         icon = DOKU_BASE + 'lib/images/toolbar/' + icon;
     }
     $ico.attr('src', icon);
+    $ico.attr('width', 16);
+    $ico.attr('height', 16);
     $btn.append($ico);
 
     // we have to return a DOM object (for compatibility reasons)