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Blazor Gantt - Virtualization Error - The given key 'viewPortHeight' was not present in the dictionary

Hi,

This is a duplicate of a comment on ticket https://support.syncfusion.com/support/tickets/405419.

I was testing the updates to the Gantt control in 20.3.0.47 and noticed an issue when applying EnableVirtualization=true when there were no records in the datasource and received the following error.  


blazor.server.js:1 [2022-10-05T22:33:15.773Z] Error: System.Collections.Generic.KeyNotFoundException: The given key 'viewPortHeight' was not present in the dictionary.
   at Syncfusion.Blazor.Gantt.SfGantt`1.UpdateChartHeight()
   at System.Threading.Tasks.Task.<>c.b__128_0(Object state)
   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.ExecuteSynchronously(TaskCompletionSource`1 completion, SendOrPostCallback d, Object state)
   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c.<.cctor>b__23_0(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.ExecuteBackground(WorkItem item)


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