<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd">
<head>
    <meta charset="utf-8"/>
</head>
<body>
<wicket:panel>
    <div wicket:id="indicatorContainer">
        <img wicket:id="throbberImage" src=""/>
    </div>
</wicket:panel>
</body>
</html>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd">
<head>
    <meta charset="utf-8"/>
</head>
<body>
<wicket:panel>
    <div wicket:id="indicatorContainer" class="z-index-modal-0">
        <img wicket:id="throbberImage" src=""/>
    </div>
</wicket:panel>
</body>
</html>

Set class to z-index-modal-0 for indicator container.
Set class to z-index-modal-0 for indicator container.
