Add method overload for ShowDialog extension with identifier

[Myliak]

Is your feature request related to a problem? Please describe.
It's rather simple problem, when iterating through xaml object tree, it would be nice to define identifier which must be on found DialogHost, so if multiple are present, it chooses correct one

Describe the solution you'd like
Create an overload method that accepts string identifier, exactly as is in DialogHost.ShowDialog

Describe alternatives you've considered
I don't think there are any, except for using only one dialoghost (so I take this as low prio)

[MichelMichels]

Could you explain a bit better what you'd like to be added? The code in DialogHost.Show(...) already accepts an identifier. I think I'm missing some information.

[Myliak]

No problem, there are two variations of how to open Dialog window in code:

1. DialogHost.Show(...) as you said - Wiki
2. .Show(...) Extension, which does not have the identifier overload - Wiki

The second one is the one I would like to add overload to :)

[github-actions]

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