fix cannot close on small screens.
MODIFY
WalletWasabi.Gui/Controls/ModalDialog.xaml
WalletWasabi.Gui/Controls/ModalDialog.xaml
<UserControl xmlns="https://github.com/avaloniaui" xmlns:cont="clr-namespace:AvalonStudio.Controls;assembly=AvalonStudio.Shell.Extensibility">
<Grid Background="#EF2D2D2D" IsVisible="{Binding IsVisible, FallbackValue=False}">
<Grid Height="500" Background="{DynamicResource ThemeControlBackgroundBrush}" Margin="10 0">
- <DockPanel LastChildFill="True" Margin="450 0 450 100">
+ <DockPanel LastChildFill="True" Margin="200 0 200 100">
<StackPanel Orientation="Horizontal" Spacing="20" HorizontalAlignment="Right" DockPanel.Dock="Bottom" Margin="8 0 8 8" TextBlock.FontSize="15">
<Button Command="{Binding CancelCommand}" IsVisible="{Binding CancelButtonVisible}" Content="Cancel" Width="160" Height="50" />
<Button Content="OK" Command="{Binding OKCommand}" IsVisible="{Binding OKButtonVisible}" Width="100" Height="30" />

fix cannot close on small screens.