Disabled Item Error in ComboBox

[Taiizor]

Describe the bug

An error occurs if the IsEnabled property of any item in the ComboBox component is set to false.

To Reproduce

`ComboBox Test = new()

Test.Items.Add(new ComboBoxItem()
{
IsEnabled = true,
Content = "True"
});

Test.Items.Add(new ComboBoxItem()
{
IsEnabled = false,
Content = "False"
});`

Expected behavior

No error occurs.

Screenshots

3.0.0-preview.7

3.0.0-preview.8

OS version

Windows 11 22621.2428

.NET version

.NET 8

WPF-UI NuGet version

3.0.0-preview.8 - 3.0.0-preview.9 - 3.0.0-preview.10

Additional context

No response

[wfjsw]

aff99851

wpfui/src/Wpf.Ui/Controls/ComboBox/ComboBox.xaml

Line 143 in 64a4c83

<SolidColorBrush Color="{DynamicResource ComboBoxItemForeground}" />

[pomianowski]

CC @niels9001

[niels9001]

PR to fix this issue: #839