fix: Fixed invalid targets being used on workspace labels, b=no-bug, c=tabs, workspaces

src/zen/tabs/zen-tabs/vertical-tabs.css

@@ -798,14 +798,12 @@
     }
   }
 
-  /* Center top buttons container */
   & #zen-sidebar-top-buttons {
     justify-content: center;
-    max-height: unset !important; /* Allow natural height */
+    max-height: unset !important;
     height: fit-content !important;
   }
 
-  /* Adjust titlebar layout for collapsed state */
   & #titlebar {
     display: grid;
     grid-template-rows: auto 1fr; /* Allow content below button box */

src/zen/workspaces/ZenWorkspaces.mjs

@@ -1170,7 +1170,10 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
       openInContainerMenuItem.setAttribute('hidden', 'true');
     }
     // Call parent node as on windows, the text can be double clicked
-    const target = event.explicitOriginalTarget?.parentNode?.closest('toolbarbutton');
+    let target;
+    try {
+      target = event.explicitOriginalTarget?.closest('toolbarbutton');
+    } catch (_) {}
     this.#contextMenuData = {
       workspaceId: target?.getAttribute('zen-workspace-id'),
       originalTarget: target,