toggle settings panel visibility

Author: praveenaak

src/MAUI/Maui.Samples/Samples/Layers/FilterBuildingSceneLayer/FilterBuildingSceneLayer.xaml.cs

@@ -73,6 +73,10 @@ private async Task Initialize()
                 PopulateFloorPicker();
                 PopulateCategoryControls();
 
+                // Toggle visiibility after content load
+                SettingsPanel.IsVisible = false;
+                SettingsPanel.IsVisible = true;
+
                 // Listen for taps on the scene view to identify features.
                 MySceneView.GeoViewTapped += MySceneView_GeoViewTapped;
             }