Windows Desktop MenuBarItems displayed inside a tabbed page needs to display inside main toolbar

Description

When displaying MenubarItems inside a tabbed page, in a desktop application, it would be better do display them on the main toolbar left-hand-side, as for a single page.

Currently, if the menu items are inside a Tabbed page, they display inside a "mini" toolbar created on the right-hand side of the main toolbar, and the menu items are displayed all compressed there.
The tabs are also displayed in the same main toolbar.

This is how they display on a single page (fine and expected)

This is how they displays in a tabbed page (not fine and very much unexpected)

It is not fine since it confuses the user for they do not expects the menus (1) to move away from their default locations. It takes away a lot from UI intuitivity. The title displayed is also displays the wrong text (2). It should not be the name of the active Tab.

Here is a suggested layout (very rough but brings over the point). It creates a toolbar just for the menu items (2), and a second toolbar for the tabs (very much like you'd expect in a WinForm situation)(1), the correct title gets displayed in the centre (3) and if there are secondary ToolBarItems, display them here (4)

Public API Changes

N/A

Intended Use-Case

I'd like desktop apps to look more like WinForm apps, especially when using tabbed pages

Start by locating the .NET MAUI desktop handling for MenuBarItems within a TabbedPage and compare it with the single-page toolbar behavior shown in the issue screenshots. Trace how the tab toolbar, menu items, title, and secondary ToolbarItems are arranged; done means tabbed desktop pages place menus and tabs in the requested separate toolbar layout with the correct title.