fix(backgroundColor scrolling): ios opaque params default false

Author: river

webview/src/commonMain/kotlin/com/multiplatform/webview/setting/PlatformWebSettings.kt

@@ -190,22 +190,22 @@ sealed class PlatformWebSettings {
     data class IOSWebSettings(
         /**
          * The ios default opaque display
-         * The default value is {@code true}.
+         * The default value is {@code false}.
+         * When Value is true will turn off these two properties:
+         * @param backgroundColor,@param underPageBackgroundColor
          */
-        var opaque: Boolean = true,
+        var opaque: Boolean = false,
         /**
          * The background color of the WebView client. The default value is {@code null}.
          * Will use WebSettings backgroundColor when null.
          *
-         * @param opaque need set into false
          * @param backgroundColor a color value
          */
         var backgroundColor: Color? = null,
         /**
          * The background color shown when the WebView client scrolls past the bounds of the active page.
          * The default value is {@code null}. Will use WebSettings backgroundColor when null.
          *
-         * @param opaque need set into false
          * @param underPageBackgroundColor a color value
          */
         var underPageBackgroundColor: Color? = null,