MenuBar positions wrong in some situations

[tznind]

Describe the bug

Running FileDialog with the following code results in a MenuBar that is mis positioned and has trailing corruption on right. I think it is to do with running using Application.Run directly without having a Top yet? The issue does not manifest in the FileDialogExamples scenario.

Application.Init ();
var dlg = new SaveDialog ("Save my file",
new List<IAllowedType> { new AllowedType("Comma Separated File",".csv") });

Application.Run (dlg);

if (!dlg.Canceled) {
    MessageBox.Query ("File Chosen", $"You chose {dlg.Path}", "Ok");
}

Application.Shutdown ();

Opening the MenuBar when running with the above code

Notice how the issue does not manifest in Scenario:

Opening the MenuBar when running in Scenario

[BDisp]

@tig I thing you should avoiding use capital letters variables for parameters, like as this:

public static RunState Begin (Toplevel Toplevel)

In this case if you have a property Toplevel Toplevel {get;} and want to set by Toplevel = Toplevel you will get an ambiguous contradiction. The compiler stay confusing if you are sets the Toplevel property or the Toplevel parameter.

The main problem of this is the Application.Top is the SaveDialog instead of the Top that is set by the Application.Init. The Begin method should set the Application.Current for the SaveDialog. Since both frame are different the menu is positioned based on the SaveDialog instead of the Driver.Cols and Driver.Rows. But isn't enough only setting to the driver bounds. It's needed a view, which is Application.Top to the positioning work.