fix: Datagrid filter menu popup displays beneath sticky header columns. #3214
Description
🐛 Bug Report
When datagrid has sticky header enabled, the popup menu is hidden beneath adjacent column headers.
💻 Repro or Code Sample
`<FluentDataGrid
TGridItem="ItemWQuantity"
Style="width:100%"
Items="@filteredItems.AsQueryable()"
GenerateHeader="GenerateHeaderOption.Sticky"
`
🤔 Expected Behavior
The filter menu should display over the sticky column headers.
😯 Current Behavior
🌍 Your Environment
- .NET 8 and Fluent UI Blazor library Version 4.11.3