rustdoc: fix up sidebar width on browser back

Author: notriddle

src/librustdoc/html/static/js/storage.js

@@ -194,7 +194,7 @@ if (getSettingValue("hide-sidebar") === "true") {
     addClass(document.documentElement, "hide-sidebar");
 }
 
-(function() {
+function updateSidebarWidth() {
     const desktopSidebarWidth = getSettingValue("desktop-sidebar-width");
     if (desktopSidebarWidth) {
         document.documentElement.style.setProperty(
@@ -209,7 +209,7 @@ if (getSettingValue("hide-sidebar") === "true") {
             srcSidebarWidth + "px"
         );
     }
-}());
+};
 
 // If we navigate away (for example to a settings page), and then use the back or
 // forward button to get back to a page, the theme may have changed in the meantime.
@@ -223,5 +223,6 @@ if (getSettingValue("hide-sidebar") === "true") {
 window.addEventListener("pageshow", ev => {
     if (ev.persisted) {
         setTimeout(updateTheme, 0);
+        setTimeout(updateSidebarWidth, 0);
     }
 });