feat: improve popup behavior.

src/Ursa/Controls/Pagination/PaginationButton.cs

@@ -0,0 +1,14 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Styling;
+
+namespace Ursa.Controls;
+
+public class PaginationButton: Button, IStyleable
+{
+    Type IStyleable.StyleKey => typeof(Button);
+    
+    public int Page { get; set; }
+    
+    
+}