Added (currently inoperative) help button to popup

popup.css

 
 .aux-button-container {
 	display: flex;
-	flex-flow: column;
 	border-top: 1px solid #ddd;
 	flex: 1 1 auto;
+	padding: 0 8px;
 }
 
-/*==================*/
-/*= OPTIONS BUTTON =*/
-/*==================*/
-
-button.options-button {
-	font-size: 1.125rem;
-	padding: 10px;
-	color: #777;
-	width: 100%;
+.aux-button-container button {
+	font-size: 1.25rem;
+	padding: 0;
 	flex: 1 1 auto;
 	font-family: Font Awesome, Inconsolata, sans-serif;
+	display: flex;
+	flex-flow: column;
+	align-items: center;
+	justify-content: center;
+	min-width: 0;
 }
-button.options-button:hover {
+.aux-button-container button::before {
+	padding: 4px 0 0 0;
+}
+.aux-button-container button:hover::before {
 	color: #000;
 }
+.aux-button-container button::after {
+	text-transform: uppercase;
+	color: #777;
+	font-size: 0.75rem;
+	padding: 4px 0 0 0;
+}
+
+/*==================*/
+/*= OPTIONS BUTTON =*/
+/*==================*/
+
 button.options-button::before {
 	content: "\F1DE";
-	font-family: Font Awesome;
-	font-size: 0.875em;
-	margin: 0 6px 0 0;
+	color: #777;
 }
 button.options-button::after {
 	content: "Options";
-	margin: 0 3px 0 0;
+}
+
+/*===============*/
+/*= HELP BUTTON =*/
+/*===============*/
+
+button.help-button::before {
+	content: "\F128";
+	font-weight: 900;
+	color: #999;
+}
+button.help-button::after {
+	content: "Help";
 }
 
 /********/

popup.html

 		<button type='button' class='reload-button'></button>
 	</div>
 	<div class='aux-button-container'>
+		<button type='button' class='help-button'></button>
 		<button type='button' class='options-button'></button>
 	</div>
 </body>

popup.js

 	document.querySelector("button.options-button").addActivateEvent(() => {
 		chrome.runtime.openOptionsPage(null);
 	});
+	
+	// Listener for the Help button.
+	document.querySelector("button.help-button").addActivateEvent(() => {
+		// TODO: code!
+	});
 
 	// Listener for reload button (appears when sticky-killing is toggled OFF).
 	document.querySelector("button.reload-button").addActivateEvent(() => {