fix refresh on remove (#2008)

* fix refresh on remove

* changelog

* optimization

* added snapshot

tests/snapshot_tests/snapshot_apps/remove_auto.py

@@ -0,0 +1,38 @@
+from textual.app import App, ComposeResult
+from textual.containers import Vertical
+from textual.widgets import Header, Footer, Label
+
+
+class VerticalRemoveApp(App[None]):
+    CSS = """
+    Vertical {
+        border: round green;
+        height: auto;
+    }
+
+    Label {
+        border: round yellow;
+        background: red;
+        color: yellow;
+    }
+    """
+    BINDINGS = [
+        ("a", "add", "Add"),
+        ("d", "del", "Delete"),
+    ]
+
+    def compose(self) -> ComposeResult:
+        yield Header()
+        yield Vertical()
+        yield Footer()
+
+    def action_add(self) -> None:
+        self.query_one(Vertical).mount(Label("This is a test label"))
+
+    def action_del(self) -> None:
+        if self.query_one(Vertical).children:
+            self.query_one(Vertical).children[-1].remove()
+
+
+if __name__ == "__main__":
+    VerticalRemoveApp().run()