 <p>Found the problem and a workaround. There's a incompatibility with bootstrap. So, if I remove the bootstrap CSS from my code, more specifically, this line:</p> <pre><code>{{ HTML::style('bootstrap/css/bootstrap.min.css') }} </code></pre> <p>The button layout works like a charm. However, I can't remove the bootstrap from my project, then I added a custom CSS to fix this little problem. Here the CSS I used:</p> <pre><code>.pui-dropdown .pui-dropdown-trigger { padding: 0px; width: 20px; } </code></pre>