Center Bootstrap Button
<p>I'm having trouble with centering Bootstrap button in panel. Margin right and left auto doesn't work.
Is there a way to properly center the button? The Button needs to be centered because of the mobile scale.</p>

<p><a href="https://i.stack.imgur.com/QQZ4m.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QQZ4m.png" alt="enter image description here"></a></p>

<p>Code:</p>

<pre><code>&lt;div class="n_monitor"&gt;
    &lt;div class="panel panel-default"&gt;
        &lt;div class="panel-body"&gt;
            &lt;div class="btn-group"&gt;
                &lt;button type="button" class="btn btn-default"&gt;Server 1&lt;/button&gt;
                &lt;button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
                    &lt;span class="caret"&gt;&lt;/span&gt;
                    &lt;span class="sr-only"&gt;Toggle Dropdown&lt;/span&gt;
                &lt;/button&gt;
                &lt;ul class="dropdown-menu"&gt;
                    &lt;li&gt;&lt;a href="#"&gt;Action&lt;/a&gt;&lt;/li&gt;
                &lt;/ul&gt;
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>CSS:</p>

<pre><code>.n_monitor .panel {
    width: 628px;
    border: solid 1px #ebebeb;
    border-top-left-radius: 0px;
    border-top-right-radius: 0px;
    border-bottom-left-radius: 3px;
    border-bottom-right-radius: 3px;
    height: 94px;
    box-shadow: none;
    margin: 0;
    background-color: #f4f4f4;
    margin-left: auto;
    margin-right: auto;
}

.n_monitor .btn {
    width: 126px;
    height: 54px;
    background-color: #3baed8;
    border: none;
    color: #fff;
    font-size: 14px;
    border-radius: 3px;
}
</code></pre>