phpengine/ui/header.tpl

<nav class="navbar sticky-top navbar-dark om-shadow navbar-expand">
	<a href="{{@BASEURL}}/"><img class="img-fluid om-shadow navbar-brand customerlogo" src="{{@LOGO_CUSTOMER}}"/></a>
	<div class="ml-auto dropdown dropleft navbar-brand">
		<a id="notification_area_button" class="disabled" href="javascript:void(0)" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" class="mr-3" style="position: relative">
			<img src="{{@BASEURL}}/ui/images/bell.png"/>
			<span id="sysmsgnum" class="blink badge badge-light"></span>
		</a>
		<div id="notification_area" class="dropdown-menu" aria-labelledby="dropdownMenuButton"></div>
	</div>
	<div>
		<a href="{{@BASEURL}}/logout"><img src="{{@ICON_LOGOUT}}" class="img-fluid om-shadow"/></a>
	</div>
</nav>