Pointer effects

App/Common UI/ReliefButton.swift

@@ -70,6 +70,11 @@ class ReliefButton: UIButton
         addSubview(backgroundView)
         
         traitCollectionDidChange(nil)
+        
+        pointerStyleProvider = { (button, pointerEffect, pointerShape) -> UIPointerStyle? in
+            let preview = UITargetedPreview(view: button)
+            return UIPointerStyle(effect: .lift(preview), shape: pointerShape)
+        }
     }
     
     required init?(coder: NSCoder) {