feat(cosmetics): updated background for home and error page, updated title

layouts/404.html

@@ -1,11 +1,15 @@
+{{ define "extrabodyclass" }}
+class="toxicGlow"
+{{ end }}
 {{ define "main" }}
 	<div id="spotlight" class="http-error animated fadeIn">
 		<div id="home-center">
 			<div class="banner-error">
 				<h1>STATUSCODE</h1>
 				<p>STATUSMSG</p>
+				<br>
 				<p class="btn-http-error">
-					<a href="{{.Site.BaseURL}}"><img class="feather" width="24" height="24" alt="home" src="{{"home.svg" | relURL}}"> {{ i18n "home" }}</a>
+					<a href="{{.Site.BaseURL}}"><img class="feather" width="48" height="48" alt="home" src="{{"arrow-left.svg" | relURL}}"> {{ i18n "home" }}</a>
 				</p>
 			</div>
 		</div>