Add support for new containerBackground API in iOS 17

ios/WonderousWidget/WonderWidgetViewComponents.swift

@@ -47,3 +47,17 @@ struct GaugeProgressStyle: ProgressViewStyle {
         }
     }
 }
+
+// Create an extension to support new containerBackground API on
+// iOS 17 while still supporting iOS 16 and less (https://nemecek.be/blog/192/hotfixing-widgets-for-ios-17-containerbackground-padding)
+extension View {
+    func widgetBackground(_ backgroundView: some View) -> some View {
+        if #available(iOSApplicationExtension 17.0, *) {
+            return containerBackground(for: .widget) {
+                backgroundView
+            }
+        } else {
+            return background(backgroundView)
+        }
+    }
+}

ios/WonderousWidget/WonderousWidgetView.swift

@@ -55,14 +55,15 @@ struct WonderousWidgetView : View {
         }
         
         return ZStack{
-            Color.darkGrey
             BgImage(entry: entry).opacity(0.8)
             LinearGradient(
                 gradient: Gradient(colors: [.black.opacity(0), .black]),
                 startPoint: .center,
                 endPoint: .bottom)
             content.padding(16)
-        }.widgetURL(URL(string: "wonderous:///collection"))
+        }
+        .widgetBackground(Color.darkGrey)
+        .widgetURL(URL(string: "wonderous:///collection"))
         
     }
 }