Windows: Check validity of this pointer in WebView2 callbacks and free WebView2Loader.dll in destructor
Linux: Fixed some issues with headless builds and don't terminate process when no X server is running
Windows: Added WindowsWebView2WebBrowserComponent wrapper to add support for custom WebView2Loader.dll location and user data folder for WebView2
Windows: Added support for Chromium-based WebView2 browser in WebBrowserComponent and removed WinRT webview