TitleBar, MacCatalyst - "traffic lights" aligned to top left corner

### Description

Hi,
In TitleBar implementation for MacCatalyst, "traffic lights" used for window control are positioned in top-left corner. Is there any possibility to center them vertically? Most of the apps center them.


### Steps to Reproduce

1) Use official TitleBar sample: https://github.com/dotnet/maui-samples/tree/main/9.0/UserInterface/Views/TitleBarDemo
2) Update Microsof.Maui.Controls to 9.0.70
3) Run demo

### Link to public reproduction project repository

https://github.com/dotnet/maui-samples/tree/main/9.0/UserInterface/Views/TitleBarDemo

### Version with bug

9.0.70 SR7

### Is this a regression from previous behavior?

No, this is something new

### Last version that worked well

Unknown/Other

### Affected platforms

macOS

### Affected platform versions

_No response_

### Did you find any workaround?

No

### Relevant log output

```shell

```

Start with the official TitleBar sample at 9.0/UserInterface/Views/TitleBarDemo and trace the MacCatalyst TitleBar implementation used by Microsoft.Maui.Controls 9.0.70. Reproduce the issue on macOS, then verify in the sample that the window-control traffic lights are vertically centered rather than aligned to the top-left corner.

Written by the indexing model from the issue text.