Use warning icon instead of a glyph, move QR styles to comments

-since it's not used anywhere else at the moment

sass/_comments.scss

@@ -1,4 +1,17 @@
 section#comments {
+	#qrcode {
+		float: right;
+		margin: 3rem 0 0 1rem;
+		background-color: white;
+		padding: 12.5px;
+		width: 150px;
+		height: 150px;
+
+		@media only screen and (max-width: 720px) {
+			display: none;
+		}
+	}
+
 	#load-comments {
 		cursor: pointer;
 	}