md-no-focus-style does not work properly in my setup - html

Question

I have a button to open my navbar:
And after I click it it get's some kind of hitmarker:
After clicking on some navbar item (thus switching to next state/view) the hitmarker should disappear. Unforunately the hitmarker is present till I click on a random element.
The html for the button:
<div ng-controller="navbarCtrl" ng-cloak>
<md-content>
<md-toolbar>
<div class="md-toolbar-tools">
<md-button class="md-icon-button" ng-click="toggleMenu()" aria-label="Menu">
<md-icon md-svg-icon="assets/img/menu.svg"></md-icon>
</md-button>
<h2>
<span><a ui-sref="overview">Test</a></span>
</h2>
<span flex></span>
<md-button class="md-icon-button" ui-sref="account" aria-label="Account">
<md-icon md-svg-icon="assets/img/account.svg"></md-icon>
</md-button>
</div>
</md-toolbar>
</md-content>
<section layout="row" flex>
<md-sidenav class="md-sidenav-left md-whiteframe-z2" md-component-id="left">
<md-toolbar class="md-theme-indigo" layout="row">
<h1 class="md-toolbar-tools">Menu</h1>
<span flex></span>
<md-button class="md-icon-button" aria-label="close" ng-click="close()">
<md-icon md-svg-icon="assets/img/closeNavbar.svg"></md-icon>
</md-button>
</md-toolbar>
<div layout="column" layout-align=" center">
<md-button ui-sref-active="active" ng-click="close()" layout-align=" center" style="text-align:left" ui-sref="overview">Overview</md-button>
</div>
</md-sidenav>
</section>
</div>
<div ui-view></div>
What do I have to change in order to fix this?

Answer 1

You need this in your CSS:
.md-focused {
background: transparent !important;
}

Answer 2

add this to your CSS:
md-button:focus, md-icon:focus {
outline: none;
}