fix: Collapsed mode spacings, glance splitting on an already split view and compact mode not setting a width on startup (closes https://github.com/zen-browser/desktop/issues/7239)

src/browser/base/content/ZenUIManager.mjs

@@ -656,6 +656,7 @@ var gZenVerticalTabsManager = {
       // Always move the splitter next to the sidebar
       this.navigatorToolbox.after(document.getElementById('zen-sidebar-splitter'));
       window.dispatchEvent(new Event('resize'));
+      gZenCompactModeManager.getAndApplySidebarWidth();
     } catch (e) {
       console.error(e);
     }