Make codeviewer example more photogenic (top bar color and bottom margins) (#3174)

examples/codeviewer/iosApp/iosApp/ContentView.swift

@@ -13,7 +13,7 @@ struct ComposeView: UIViewControllerRepresentable {
 struct ContentView: View {
     var body: some View {
         ComposeView()
-                .ignoresSafeArea(.keyboard) // Compose has own keyboard handler
+                .ignoresSafeArea(.all, edges: .bottom) // Compose has own keyboard handler
     }
 }
 

examples/codeviewer/iosApp/iosApp/iOSApp.swift

@@ -4,7 +4,10 @@ import SwiftUI
 struct iOSApp: App {
 	var body: some Scene {
 		WindowGroup {
-			ContentView()
+		    ZStack {
+		        Color(#colorLiteral(red: 0.235, green: 0.247, blue: 0.255, alpha: 1)).ignoresSafeArea(.all)
+			    ContentView()
+			}.preferredColorScheme(.dark)
 		}
 	}
 }

examples/codeviewer/shared/src/commonMain/kotlin/org/jetbrains/codeviewer/ui/statusbar/StatusBar.kt

@@ -18,9 +18,9 @@ private val MaxFontSize = 40.sp
 @Composable
 fun StatusBar(settings: Settings) = Box(
     Modifier
+        .padding(16.dp, 4.dp, 16.dp, 16.dp)
         .height(32.dp)
         .fillMaxWidth()
-        .padding(4.dp)
 ) {
     Row(Modifier.fillMaxHeight().align(Alignment.CenterEnd)) {
         Text(