Build compact live control view

src/routes/+layout.svelte

@@ -34,6 +34,8 @@
 
 {#if data.presentationMode}
 	{@render children()}
+{:else if data.user && data.liveControllerMode}
+	<main id="main-content" class="live-controller-shell">{@render children()}</main>
 {:else if data.user}
 	<div class="app-shell">
 		<aside class="sidebar">