Add some padding to Done button

gui/ui/app.slint

@@ -132,10 +132,13 @@ component ShopView inherits VerticalBox {
         items <=> list;
     }
 
-    Button {
-        text: "I am done hehe";
-        clicked => {
-            State.delete-checked();
+    HorizontalLayout {
+        padding: 12px;
+        Button {
+            text: "I am done hehe";
+            clicked => {
+                State.delete-checked();
+            }
         }
     }
 }