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="collapse navbar-collapse"></div>
	<a class="navbar-brand" href="{{@BASEURL}}/logout">
		<img src="{{@ICON_LOGOUT}}" class="img-fluid om-shadow"/>
	</a>
</nav>