feat: unify option name.

src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs

@@ -43,6 +43,8 @@ public class OverlayDialogOptions
     /// <summary>
     /// Only works for CustomDialogControl
     /// </summary>
+    public bool IsCloseButtonVisible { get; set; } = true;
+    [Obsolete()]
     public bool ShowCloseButton { get; set; } = true;
     public bool CanLightDismiss { get; set; }
     public bool CanDragMove { get; set; } = true;

src/Ursa/Controls/Dialog/OverlayDialog.cs

@@ -195,7 +195,7 @@ public static class OverlayDialog
             control.HorizontalAnchor == HorizontalPosition.Center ? null : options.HorizontalOffset;
         control.VerticalOffset =
             options.VerticalAnchor == VerticalPosition.Center ? null : options.VerticalOffset;
-        control.IsCloseButtonVisible = options.ShowCloseButton;
+        control.IsCloseButtonVisible = options.IsCloseButtonVisible;
         control.CanLightDismiss = options.CanLightDismiss;
         DialogControlBase.SetCanDragMove(control, options.CanDragMove);
     }