apply container background to widgets

.xcode-version

@@ -1 +1 @@
-14.3.1
+15.0.1

Widgets/LockScreenWidgets.swift

@@ -114,6 +114,7 @@ struct LockScreenWidgetView: View {
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity)
         .background(Circle().foregroundColor(.white.opacity(0.3)))
+        .widgetContainerBackground()
     }
 
 }

Widgets/WidgetViews.swift

@@ -206,6 +206,7 @@ struct FavoritesWidgetView: View {
             .padding(EdgeInsets(top: widgetFamily == .systemLarge ? 48 : 60, leading: 0, bottom: 0, trailing: 0))
 
         }
+        .widgetContainerBackground()
     }
 }
 
@@ -239,12 +240,21 @@ struct SearchWidgetView: View {
                 }
             }.accessibilityHidden(true)
         }
+        .widgetContainerBackground()
     }
 }
 
 // See https://stackoverflow.com/a/59228385/73479
 extension View {
 
+    @ViewBuilder func widgetContainerBackground() -> some View {
+        if #available(iOSApplicationExtension 17.0, *) {
+            containerBackground(for: .widget) {
+                Color.clear
+            }
+        }
+    }
+
     /// Hide or show the view based on a boolean value.
     ///
     /// Example for visibility: