implement groupbox control
MODIFY
WalletWasabi.Gui/App.xaml
WalletWasabi.Gui/App.xaml
<StyleInclude Source="resm:Dock.Avalonia.Controls.DockTarget.xaml?assembly=Dock.Avalonia" />
<StyleInclude Source="resm:Dock.Avalonia.Controls.DockToolChrome.xaml?assembly=Dock.Avalonia" />
<StyleInclude Source="resm:Dock.Avalonia.Controls.MetroWindow.xaml?assembly=Dock.Avalonia" />
+ <StyleInclude Source="resm:WalletWasabi.Gui.Controls.GroupBox.xaml?assembly=WalletWasabi.Gui" />
</Application.Styles>
<Application.DataTemplates>
<DataTemplate DataType="Views:MainView">

implement groupbox control