BS icon and text spacing in button

by AlexandrAbakumov

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
  <div class="menu"></div>
  <div class="d-flex flex-fill content">
    <div class="flex-fill tabset"></div>
  </div>

CSS

html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

.container {
  background-color: black;
}

.menu {
  background-color: blue;
  flex: 0 0 50px;
}

.content {
  background-color: green;
}

.tabset {
  background-color: yellow;
}