WebBrowserComponent: Enable Safari Web Inspector in debug builds

Author: matok

modules/juce_gui_extra/native/juce_WebBrowserComponent_mac.mm

@@ -893,6 +893,10 @@ void evaluateJavascript (const String&, WebBrowserComponent::EvaluationCallback)
                                           configuration: config.get()]);
        #endif
 
+       #if JUCE_DEBUG
+        [webView.get() setValue:@(true) forKey:@"inspectable"];
+       #endif
+
         if (const auto userAgent = browserOptions.getUserAgent(); userAgent.isNotEmpty())
             webView.get().customUserAgent = juceStringToNS (userAgent);