fix MessageBox focus

[Diaskhan]

AvaloniaCommunity/MessageBox.Avalonia#193
Createa an issue

[anovik]

Thanks for creating issue, but they are quite slow in reactions so I don't believe this will be fixed soon. Let's fix it from our side.

[anovik]

I tested this change and it works for me. Please check a couple of other messagebox occurrences in code and change them similarly. You can search by "messageBoxWindow"

[Diaskhan]

Find another places where behaviour is not expected.

Is only thing that distracting me.
Is when we create folder, focus by default Is not on TextBox.

public void ShowInput(Window owner)
Could u recomend something ?

I've created issue in related repo
AvaloniaCommunity/MessageBox.Avalonia#194

[anovik]

No, I don't know how to fix TextBox focus, I guess some changes for that are necessary in message box repo.

I am going to proceed with merging this PR, if any issues still happen, we will handle them separately.