Fix persistentHamburgerMenu offset behavior.

src/UIShell/Content.svelte

@@ -3,7 +3,10 @@
   export let id = "main-content";
 
   import { Grid, Row, Column } from "../Grid";
-  import { shouldRenderHamburgerMenu } from "./navStore";
+  import {
+    shouldRenderHamburgerMenu,
+    isPersistentHamburgerMenu,
+  } from "./navStore";
 </script>
 
 <div
@@ -19,7 +22,9 @@
       <Grid>
         <Row>
           <Column
-            lg="{$shouldRenderHamburgerMenu ? { span: 13, offset: 3 } : {}}"
+            lg="{$shouldRenderHamburgerMenu && !$isPersistentHamburgerMenu
+              ? { span: 13, offset: 3 }
+              : {}}"
           >
             <slot />
           </Column>

src/UIShell/Header.svelte

@@ -62,11 +62,15 @@
 
   import Close from "../icons/Close.svelte";
   import Menu from "../icons/Menu.svelte";
-  import { shouldRenderHamburgerMenu } from "./navStore";
+  import {
+    shouldRenderHamburgerMenu,
+    isPersistentHamburgerMenu,
+  } from "./navStore";
   import HamburgerMenu from "./HamburgerMenu.svelte";
 
   let winWidth = undefined;
 
+  $: $isPersistentHamburgerMenu = persistentHamburgerMenu;
   $: isSideNavOpen =
     expandedByDefault &&
     winWidth >= expansionBreakpoint &&

src/UIShell/navStore.js

@@ -1,3 +1,5 @@
 import { writable } from "svelte/store";
 
 export const shouldRenderHamburgerMenu = writable(false);
+
+export const isPersistentHamburgerMenu = writable(false);