Center alignment button inside RIbbonGroupBox

[Demarsch]

I found the question similar to mine on CodePlex and seems like author didn't asked it here on GitHub so I just copy it here:

Hi, I have the following code:

<fluent:RibbonGroupBox Header="Table"
                       MinWidth="120"
                       HorizontalContentAlignment="Center">
               <fluent:Button Header="Создать"
                      LargeIcon="pack://application:,,,/PatientInfoModule;Component/Resources/Images/AddPatient-48x48.png"
                   SizeDefinition="Large"
                   HorizontalAlignment="Center"
                   Command="{Binding ContentViewModel.CreateNewPatientCommand}" />    
 </fluent:RibbonGroupBox>

In my case the header of group box is wider than button so I have to set min width. But I end up having button left aligned. If I don't set min width then group box header is clipped

How can I center align this button?

[batzen]

Currently there is no way to achieve this by the way you tried it.
I can see the use case for this so I will make it possible.