Fail the accessibility sweep when a window cannot open

tests/UI/Logic/AccessibleNamesTests.cs

@@ -43,6 +43,7 @@
             .ToList();
 
         var unnamed = new StringBuilder();
+        var openFailures = new StringBuilder();
         var opened = 0;
         var skipped = new List<string>();
         foreach (var type in windowTypes)
@@ -71,7 +72,8 @@
             }
             catch (Exception e)
             {
-                skipped.Add($"{type.Name} ({(e as TargetInvocationException)?.InnerException?.GetType().Name ?? e.GetType().Name})");
+                var cause = (e as TargetInvocationException)?.InnerException ?? e;
+                openFailures.AppendLine($"{type.Name}: {cause.GetType().Name}: {cause.Message}");
                 continue;
             }
 
@@ -99,6 +101,7 @@
             }
         }
 
+        Assert.True(openFailures.Length == 0, $"Windows that failed to open:\n{openFailures}");
         Assert.True(opened > 50, $"Only {opened} windows opened; skipped: {string.Join(", ", skipped)}");
         Assert.True(unnamed.Length == 0, $"Inputs without an accessible name ({opened} windows opened, {skipped.Count} skipped):\n{unnamed}");
     }
@@ -130,9 +133,9 @@
             parts.Add($"name={control.Name}");
         }
 
         if (control is TextBox textBox && !string.IsNullOrEmpty(textBox.Watermark))
         {
             parts.Add($"watermark={textBox.Watermark}");
         }
 
         var parent = control.Parent;