FileManager: Group Toolbar overflow

Author: https://github.com/frhun
Commit: 6e2fc0285e
Pull-request: https://github.com/SerenityOS/serenity/pull/15484
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Applications/FileManager/FileManagerWindow.gml

@@ -10,6 +10,7 @@
         @GUI::Toolbar {
             name: "main_toolbar"
             collapsible: true
+            grouped: true
         }
 
         @GUI::Toolbar {