Display session code to organisers

ui/html/game.page.tmpl.html

@@ -8,7 +8,7 @@
 {{ end -}}
 
 {{- define "header" }}
-	<h1>{{ .P.Edges.Session.Edges.Game.Name }}</h1>
+	<h1>{{ .P.Edges.Session.Edges.Game.Name }}<span id="session-code"> ({{ .P.Edges.Session.Code }})</span></h1>
 {{ end -}}
 
 {{- define "main" }}

ui/static/game.css

@@ -65,6 +65,14 @@ body.organiser #controls {
     justify-content: flex-end;
 }
 
+#session-code {
+    display: none;
+}
+
+body.organiser #session-code {
+    display: inline;
+}
+
 @keyframes appear {
     from {
         transform: scale(2, 2);