Material Icon in Button is Not Clickable - google-material-icons

Question

I have a button being used to show a dropdown div. The button padding and text can be clicked on to show the dropdown div. The very small Material "font-icon" CANNOT be clicked to show the dropdown div. How can I ensure that you can click anywhere within the button (including directly on the Material icon) in order to show the dropdown div.
Here is a link to show you what I've done.
/* When the user clicks on the button,
toggle between hiding and showing the dropdown content */
function myFunction() {
document.getElementById("myDropdown").classList.toggle("show");
}
// Close the dropdown menu if the user clicks outside of it
window.onclick = function(event) {
if (!event.target.matches('.dropbtn')) {
var dropdowns = document.getElementsByClassName("dropdown-content");
var i;
for (i = 0; i < dropdowns.length; i++) {
var openDropdown = dropdowns[i];
if (openDropdown.classList.contains('show')) {
openDropdown.classList.remove('show');
}
}
}
}
// Hide Header on on scroll down
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('header').outerHeight();
$(window).scroll(function(event){
didScroll = true;
});
setInterval(function() {
if (didScroll) {
hasScrolled();
didScroll = false;
}
}, 250);
function hasScrolled() {
var st = $(this).scrollTop();
// Make sure they scroll more than delta
if(Math.abs(lastScrollTop - st) <= delta)
return;
// If they scrolled down and are past the navbar, add class .nav-up.
// This is necessary so you never see what is "behind" the navbar.
if (st > lastScrollTop && st > navbarHeight){
// Scroll Down
$('header').removeClass('nav-down').addClass('nav-up');
} else {
// Scroll Up
if(st + $(window).height() < $(document).height()) {
$('header').removeClass('nav-up').addClass('nav-down');
}
}
lastScrollTop = st;
}
body {
margin: 0;
color: #333;
overflow-x: hidden;
padding-top: 80px;
}
:root{
var-MainColor: #4C00F9;
--main-color: #4C00F9;
}
header {
background: #f5b335;
height: 40px;
position: fixed;
top: 0;
transition: top 0.2s ease-in-out;
width: 100%;
}
.nav-up {
top: -64px;
}
#navWrapper {
padding: 0px;
border-bottom: 1px solid #eee;
font-size: 13px;
font-family: Sans-Serif;
width: 100%;
background-color: #fff;
z-index: 1000;
height: 64px;
}
#navLeft {
float: left;
}
#navRight {
float: right;
}
/* Dropdown Button */
.dropbtn {
background-color: transparent;
color: var(--main-color);
padding: 24px;
font-size: 13px;
border: none;
cursor: pointer;
}
/* Dropdown button on hover & focus */
.dropbtn:hover, .dropbtn:focus {
background-color: var(--main-color);
color: #fff;
outline: none;
}
/* The container <div> - needed to position the dropdown content */
.dropdown {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content {
display: none;
position: absolute;
margin-left: 10px;
margin-right: 2%;
margin-top: -8px;
border-radius: 2px;
background-color: #fff;
min-width: 260px;
border: 0px solid #eee;
box-shadow: 0px 1px 5px 0px rgba(0,0,0,0.3);
z-index: 1;
}
/* Links inside the dropdown */
.dropdown-content a {
color: var(--main-color);
padding: 24px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #fdfdfd;}
/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {display:block;}
.material-icons.md-01 { font-size: 13px; vertical-align: middle; margin-top: -3px;}
.material-icons.md-02 { font-size: 24px; vertical-align: middle; margin-top: -5px; color: red;}
.material-icons.md-03 { font-size: 24px; vertical-align: middle; margin-top: -5px; color: #40FA35;}
.material-icons.md-04 { font-size: 21px; vertical-align: middle; margin-top: -1px;}
.material-icons.md-05 { font-size: 16px; vertical-align: middle; margin-top: -1px;margin-right: 15px;}
#main {
margin-top: 50px;
position: absolute;
}
section {
width: 100%;
border-bottom: 1px solid #eee;
padding: 50px 0px;
}
#sectionInnerText {
max-width: 700px;
padding: 0px 100px;
}
#sectionInnerImage {
max-width: 1000px;
padding: 0px 100px;
}
#sectionInnerImage-rowWrapper {
padding: 0px 100px;
}
#sectionInnerImage-3row {
width: 31%;
max-width: 400px;
display: inline-block;
margin-right: 1vw;
}
#sectionInnerImage-2row {
width: 48%;
max-width: 1000px;
display: inline-block;
margin-right: 1vw;
}
h1 {
font-size: 36px;
margin-bottom: 30px;
font-weight: 700;
font-family: Sans-Serif;
}
h2 {
font-size: 22px;
font-family: Sans-Serif;
font-weight: 700;
margin-top: 15px;
}
h3 {
font-size: 13px;
font-family: Sans-Serif;
font-weight: normal;
margin-bottom: 30px;
}
h4 {
font-size: 17px;
font-family: Sans-Serif;
font-weight: 700;
margin-top: 5px;
margin-bottom: 0;
display: inline-block;
}
p {
font-size: 19px;
line-height: 180%;
font-family: Georgia, Cambria, "Times New Roman", Times, serif;
font-weight: normal;
margin: 15px 0;
}
a.one {
display: block;
color: #fff;
background-color: var(--main-color);
padding: 16px;
text-decoration: none;
text-align: center;
border-radius: 3px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
max-width: 350px;
}
a.one:hover {
background: #4C03F1;
}
a.one:active {
background-color: var(--main-color);
}
#media only screen and (min-width: 1080px) {
section {
min-height: 30vh;
}
}
#media only screen and (max-width: 1080px) {
html, body {
margin: 0;
color: #333;
overflow-x: hidden;
}
section {
width: 100%;
border-bottom: 1px solid #eee;
padding: 0px;
}
#sectionInnerText {
padding: 2vh 5vw;
}
#sectionInnerImage {
padding: 0 5vw;
}
#sectionInnerImage-rowWrapper {
padding: 0 5vw;
}
#sectionInnerImage-3row {
width: 100%;
max-width: 1000px;
}
#sectionInnerImage-2row {
width: 100%;
max-width: 1000px;
}
p {
font-size: 21px;
}
ul li {
font-size: 21px;
}
a.one, a.two, a.three, a.four {
display: block;
margin-bottom: 25px;
max-width: 100%;
max-width: 450px;
}
.dropdown-content {
width: 100vw;
margin: 0;
margin-top: -6px;
background-color: #fff;
min-width: 260px;
border: 0px solid #eee;
border-top: 1px solid #eee;
border-bottom: 0;
z-index: 1;
box-shadow: 0px 3px 5px 0px rgba(0,0,0,0.12);
}
.dropdown-content a{
border-bottom: 1px solid #f4f4f4;
}
}
<head>
<link href="https://fonts.googleapis.com/icon?family=Material+Icons"
rel="stylesheet">
</head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<header class="nav-down">
<div id="navWrapper">
<div id="navLeft">
<div class="dropdown">
<button onclick="myFunction()" class="dropbtn">Menu <i class="material-icons md-01">keyboard_arrow_down</i></button>
<div id="myDropdown" class="dropdown-content">
<i class="material-icons md-05">home</i> Home & Projects List
<i class="material-icons md-05">dashboard</i> Project 01
<i class="material-icons md-05">dashboard</i> Project 02
<i class="material-icons md-05">dashboard</i> Project 03
<i class="material-icons md-05">account_circle</i> Info & Contact
<i class="material-icons md-05">picture_as_pdf</i> View & Download Resume
</div>
</div>
</div>
</div>
</header>