Cannot adjust padding on MenuItem elements

Describe the bug

When using WPF-UI, menu items have an approximately 13px padding applied to them. Manually setting the padding on the menu item to a different thickness value is ignored.

To Reproduce

1. Create a new project with WPF-UI
2. Add a menu bar with menu items
3. Change padding on the menu items to 4
4. Original padding remains, so if the height of the menu bar is reduced, the menu item text will become cut off.

<Window x:Class="WpfApp2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        MinWidth="200"
        SizeToContent="WidthAndHeight"
        mc:Ignorable="d">
    <Menu Height="40" Margin="2">
        <MenuItem Padding="4" Header="BUTTON 1" />
        <MenuItem Padding="4" Header="BUTTON 2" />
    </Menu>
</Window>

Expected behavior

Setting a different padding on the MenuItem element should be respected

Screenshots

Current behavior:

Expected behavior:

OS version

Windows 10

.NET version

All (issue reproduced on .NET Framework 4.8, .NET 6.0 and .NET 8.0)

WPF-UI NuGet version

Both latest stable (2.1.0) and preview (3.0.0-preview.13)

Additional context

No response

Reproduce the issue using the XAML example with WPF-UI MenuItem elements and a custom Padding value. Then trace the MenuItem styling and template used by WPF-UI; the work is done when the specified padding is respected and the menu item text is no longer clipped.